I N N O V A T I V E S O L U T I O N S I N S E N S O R S A N D C O N T R O L S
Precision ProductsAircraft Circuit Breakers
7270-7
7271-8
7271-3
Aircraft Circuit Breakers
2TC14 2TC663TC14
5TC50
3TC7
6TC9TC
2TC49
6752-12 6752-305 6752-100
7277-2
7277-1
20TC
7274-2 7274-4 7274-11 and 7274-69
3SB2
3SB4
7270-1
Sensata is the leading supplier of circuit breakers to the global aircraft industry and has established theindustry standard for quality, reliability, andperformance. Sensata has pioneered virtually all of the aircraft circuit breakers styles used in today’saircraft. Sensata’s complete line of circuit breakers o�ers a broad selection of types, features and design options.
• Single pole or three pole versions• Ratings from 1⁄2 to 100 amps • Trip free design• Temperature or non-temperature compensated
Applications
Sensata’s broad circuit breaker product line is ideal forthose rugged applications that require a high level ofreliability and performance as well as excellentvibration and shock resistance including:
• Power distribution systems on commercial andmilitary aircraft
• Ground support equipment• Avionics• Missile launcher systems• Aircraft simulators• Power distribution systems on military vehicles
Overview Index
Sensata Number
Guide ....................................................................2TC, 3TC ..............................................................6TC, 9TC............................................................... 2TC49 ...................................................................5TC .......................................................................6752 ......................................................................6752-100 ...............................................................3TC7......................................................................7274-2,-4,-11,-69 ..................................................7277 ......................................................................20TC .....................................................................7270-1, 7271-8 .....................................................3SB2, 3SB4............................................................Arc Fault ..............................................................Cross Reference ...................................................Glossary ................................................................
Page
2, 34, 56, 78, 9
10, 1112, 1314, 1516, 1718, 19
2021
22, 2324, 2526, 27
2829
Sensata maintains a complete line of MS and customerapprovals on most major aircrafts worldwide. Due tospace limitations, these con�gurations cannot all beshown.
7276 style aircraft circuit breaker is not shown in thecatalog.
• Excellent vibration and shock resistance• Quali�ed to global commercial and
military standards • Optional auxiliary switch• Thermal and magnetic sensing• Push button, toggle or rocker switch• Long push button• Various terminal con�gurations• MS and commercial con�guration• Manual reset• 28VDC or 120VAC, 400 Hz
For more information contact our product manager:Tel: (508) 236-3573
For more information on circuit breakers contact:Tel: (508) 236-3536
Website address: www.sensata.com
Condensed Aircraft Circuit Breaker Guide This guide gives a brief description of most circuit breakers manufactured by Sensata Technologies. For more information,
please consult the appropriate section of this catalog.
CIRC
UIT
BRE
AKE
RTY
PEN
UM
BER
TYPE
APP
ROVA
L
ACT
UAT
ING
OR
RESE
TM
EAN
S
MA
NU
AL
TRIP
IND
ICAT
ING
RATI
NG
IN A
MPS
MA
JOR
DIM
ENSI
ON
SIN
INCH
ESA
PPRO
X.L
x W
x H
APP
ROX.
WT.
ING
RAM
S
APP
ROX.
200%
TIM
E SE
CON
DS
TIM
E TO
TRIP
AT
TWIC
E RA
TED
CU
RREN
T
2TC3TC
5TC
6TC9TC2TC49
3TC7
6752-126752-1006752-3057274
7277
7270727120TC2
3SB
Aircraft
Aircraft
Aircraft
Aircraft
Aircraft
Aircraft
Aircraft
Aircraft
Aircraft
Aircraft
Simulator
MS 3320MS 14105
––
MS 14154MS 14153M5809/1
MS 25244
MS 24571MS 25361
MS 26574MS 22073
––
MS 24509MS 24510
––
––
Button
Button
Button
Button
Button
Button
Button
Button
ToggleButtonRocker
Button
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
1 - 3515 - 35
20 - 50
2 - 251, 15 - 352.5 - 15
5 - 35
2.5 - 5050 - 1002.5 - 901/2 - 20
1/2 - 20
3 - 35
3 - 35
––
.75 x .56 x 1.21.10 x .75 x 1.2
1.65 x .77 x 1.92
.75 x 1.78 x 1.21.10 x 2.35 x 1.21.21 x .75 x .56
1.1 x .75 x 1.49
2.2 x .75 x 3.32.2 x .75 x 3.32.2 x 2.25 x 3.3.750 x .562 x 2.2
.750 x .562 x 2.2
1.37 x .75 x 2.251.37 x .75 x 2.002 x .750 x 2
.750 x .562 x 2.2
25.036.0
57.5 (std.)59.4 (aux.)
65.0110.0
25.0
38.9
91.091.0
292.028.032.025.0
39.0
39.0
30.0
1010
10
101010
35
35
10
10
505050
––
MIL Approved Aircraft Circuit Breakers
*Note: For cross reference information, refer to page 28.
MS Number
MS 3320MS 3320LMS 3320VMS 14105MS 14105LMS 14153MS 14154MS 14154L
Sensata Number
2TC22TC272TC633TC23TC279TC26TC26TC37
Page
4, 54, 54, 54, 54. 56, 76, 76, 7
MS Number
MS 14154VMS 5809/1MS 24571MS 24571VMS 25361MS 25361VMS 22073MS 22073V
Sensata Number
6TC632TC496752-126752-126752-1006752-1027274-117274-69
Page
6, 78, 912, 1312, 1314, 1514, 1518, 1918, 19
MS Number
MS 26574MS 26574AMS 26574LMS 24509AMS 24509BMS 24510AMS 24510BMS 25244
Sensata Number
7274-27274-47274-707270-17270-77271-87271-33TC7
Page
18, 1918, 1918, 1922, 2322, 2322, 2322, 2316, 17
FAU
LTIN
TERR
UPT
ING
CAPA
CITY
AM
PS @
VOLT
S&
CYC
LES
REMARKS TYPICAL APPLICATIONS
6000 @ 28 VDC2500 @ 120 VAC, 400 Hz6000 @ 28 VDC2000 @ 120 VAC, 400 Hz4000 @ 28 VDC2000 @ 115 VAC, 400 Hz2000 @ 120 VAC, 400 Hz2000 @ 120 VAC, 400 Hz6000 @ 28 VDC2500 @ 120 VAC, 400 Hz6000 @ 30 VDC3500 @ 120 VAC, 400 Hz
6000 @ 30 VDC120 VAC, 400 Hz
2000 @ 28 VDC500 @ 125 VAC, 400 Hz2000 @ 28 VDC500 @ 120 VAC, 400 Hz4000 @ 30 VDC3500 @ 120 VAC, 400 Hz2000 @ 30 VDC1000 @ 120 VAC, 400 Hz
––
Subminiature,ambient compensated 1 poleauxiliary switch available
Ambient compensated
Subminiature,ambient compensated, 3 poleDual Safety 2TC
Lightweight, high performance,non-ambient temperaturecompensated1 Pole – 6752-121 Pole – 6752-1003 Pole – 6752-305Quick acting, subminiatureauxiliary switch availableWide calibrationversion of 7274Toggle or push button
Rocker switch type
Push button
Aircraft power distribution
Aircraft, avionics, and electrical systems
Aircraft power distribution
Aircraft power distribution
Aircraft, avionics, and electrical systems
Aircraft power distributionground support
Aircraft power distribution,Avionics, ground support, missile systemsProtection of wire, motors, solenoids,transformers in electronicsAircraft power distribution
Combination circuit switching & protectionlight aircraft, electronics, vehiclesCommercial and military simulators
Condensed Aircraft Circuit Breaker Guide CI
RCU
ITB
REA
KER
TYPE
NU
MB
ER
2TC3TC
5TC
6TC9TC2TC49
3TC7
6752-126752-1006752-3057274
7277
7270727120TC2
3SB
For more information contact our product manager:Tel: (508) 236-3573
For more information on circuit breakers contact:Tel: (508) 236-3536
Website address: www.sensata.com
*Note: For FAA/PMA approved devices, go to www.klixon.com
Single Phase TC Series Circuit BreakersMiniature Ambient Compensated
Overview
Klixon® single-phase TC devicesare the smallest, lightest aircraftcircuit breakers available today.They represent “state-of-the-art”protection for today’s aerospacepower systems. Their light weightand small size make themespecially well suited for aircraft,avionics and electronic systems.
The Klixon trademark has set thestandard for aerospace circuitbreakers. Despite the small size,the TC series o�ers the enduranceand reliability required byexacting military speci�cations,and are available in standardcurrent ratings from 1 – 35amperes.
Coordination
The 2, 3, 6 and 9TC breaker rat-ings are coordinated so any ratingwill trip before another circuitbreaker, twice its rating, in theevent of a fault of up to 6000amps let-thru current. Thisresults in improved overall equip-ment performance, since only thesmallest faulted circuit is inter-rupted, while larger circuitsremain operational (see pages 6and 7 for 6/9TC details).
Ambient TemperatureCompensation
Ambient compensated circuitbreakers permit system designersto specify smaller gauge wirewhere the circuit breaker andwiring are exposed to di�erentambient temperatures. They areespecially suited for applicationswhere the ambient temperatureexceeds the 160oF maximum ofnon-ambient compensated thermalcircuit breakers. The TC seriesmay be applied where operatingtemperatures are as high as 250oF(121oC), with no derating of thecircuit breaker. This eliminates theneed for cooling air and allowssubstantial weight, space andcost savings.
Options*
• Longer push buttons
• High vibration
• Random vibration
• Metric mounting thread
• Metric terminal thread
• Dust boot†
• Auxiliary switch - male andfemale contacts available
• Terminal barriers
• Plug-in terminals
Trip Free
The complete line of TC seriescircuit breakers is trip free. Thecircuit breaker cannot be main-tained closed during an overloadeven with the actuator buttonheld closed.
High Short Circuit Capacity
For its miniature size, the 2/3TCseries o�ers unusually highcurrent interrupting capacity.Overloads up to 6000 amps at28 VDC or 2000-3500 amps at120 VAC, 400 Hz can be safelyinterrupted without a�ectingcalibration or operatingperformance in the standard2/3TC series.
Qualifications
MS3320 - 2TC2
MS3320L - 2TC27
MS3320V - 2TC63
MS14105 - 3TC2
MS14105L - 3TC27
European standards
SAE standards
All U.S. aircraft OEM’s
Most European aircraft OEM’s
* Contact factory for details† Part Number 14500-1 Fits 15/32 Bushing
Part Number 14500-5 Fits 7/16 Bushing
2TC14 2TC66 3TC14
Features
• Miniature size
• Light weight
• Trip free
• Mil-quali�cation
• Current rating 1-35 amperes
• Coordinated ratings
• High vibration resistance
• High interrupt capacity
TEMPoC
+25-54
+121
MIN ULTTRIP
115%115%
85%
MAX ULTTRIP
138%165%145%
TRIP TIME - SECONDS
200%4-167-352-13
500%.4-1.6.6-3.0
.25-1.0
1000%.10-.40.15-.70.06-.25
TEMPoC
+25-54
+121
MIN ULTTRIP
115%115%
85%
MAX ULTTRIP
138%165%145%
TRIP TIME - SECONDS
200%4-206-352-15
500%.40-1.7.55-3.0.25-1.0
1000%.10-.40.15-.70.06-.25
Vibration*....................... 10 G’s minimum, 50 - 500 HzMechanical Shock.......... 50 G’sAcceleration................... 10 G’sWeight............................. 2TC14 - 24 gm max.
3TC14 - 36 gm max.
Interrupt Current1-20 amps: 6000 amps at 28 VDC25 amps: 1625 amps at 28 VDC1-15 amps: 2500 amps at 120 VAC, 400 Hz20 amps: 2000 amps at 120 VAC, 400 Hz25 amps: 1800 amps at 120 VAC, 400 Hz
Endurance2500 cycles 120 VAC, 400 Hz Inductive5000 cycles 120 VAC, 400 Hz Resistive2500 cycles 30 VDC Inductive5000 cycles 30 VDC Resistive10,000 cycles Mechanical, no load
2TC14-12TC14-22TC14-21⁄22TC14-32TC14-42TC14-52TC14-71⁄22TC14-102TC14-152TC14-202TC14-25
1.100.700.500.400.450.350.300.280.250.250.20
3TC14-153TC14-203TC14-253TC14-303TC14-35
SensataNumber
VoltageDrop (max.)**
SensataNumber
VoltageDrop (max.)**
* Other vibration levels available. Contact factory for details.
**Max. voltage drop at nominal rated current.
0.250.250.250.250.25
Characteristics
2TC14 3TC14
.750
.078
.375 OFMOUNTING KEY
5 AMPRATINGSHOWN
CL
.031
.562MAX.
.047
.704
1.030MAX. 1.218
15/32-32UNS-2A .250
Panel Mounting.125±.005 Dia.
.375±.005
.485±.005 Dia.
#8-32 UNC
Calibration: 1-25 amps Calibration: 15-35 amps
Panel Mounting.125±.005 Dia.
.375±.005
.485±.005 Dia.
.047
.704
1.030MAX. 1.218
15/32-32UNS-2A
.250
#8-32 UNC
CL
.078
.031
1.100MAX.
.781MAX.
Approximate Time-Current Curves - 2TC and 3TC Circuit Breakers1000
100
% R
ated
Cur
rent
0.01 0.1 1 10 100 1000Trip Time in Seconds
165%138%115%85%
-54oC MAXIMUM TRIP CURVE
+25oC TRIP BAND
+121oC MINIMUM TRIP CURVE
5 35
.375 OFMOUNTING KEY
2TC14 / 3TC14
35 AMPRATINGSHOWN
Three Phase TC Series Circuit Breakers Miniature Ambient Compensated
Features
• One phase trips all
• Protective shields between each phase’s terminals
• Pads increase mounting stability
• Also includes identical featuresas 2TC and 3TC
Overview
The 6TC and 9TC circuit breakersprovide ambient compensatedcircuit protection in a lightweight,subminiature package size. Thethree phase design integrateseach individual phase to provide overcurrent protection in theevent of simultaneous orunbalanced overloads, includingshort circuit conditions.
Coordination
The 6TC and 9TC are compatiblewith their single phase 2TC and3TC cousins. The 6TC and 9TCare available in ratings from 1-35amps, with military and variouscommercial approvals on moststyles.
Ambient TemperatureCompensation
The 6TC and 9TC are ambientcompensated circuit breakers. Thisallows usage of smaller gauge wire.
The 6TC and 9TC can operate over a temperature range of-54oC to 121oC, however, careshould be taken to understand thespeci�cation limits at elevatedambient temperatures.
Options*
• Longer push buttons
• High vibration
• Metric mounting thread
• Metric terminal thread
• Dust boot†
• Auxiliary switch device available††
* Contact factory for details† Part Number 14500-1 fits 15/32 bushing
Part Number 14500-5 fits 7/16 bushing†† 6TC Device
Trip Free
The complete line of TC seriescircuit breakers is trip free. The circuit breaker cannot be main-tained closed during an overload,even with the actuator buttonheld closed.
High Short Circuit Capacity
For its miniature size, the 6/9TCseries o�ers unusually highcurrent interrupting capacity.Overloads up to 2000 amps at120 VAC, 400 Hz can be safelyinterrupted without a�ectingcalibration or operatingperformance in the standard6/9TC series.
Qualifications
MS14154 6TC2
MS14154L 6TC37
MS14154V 6TC63
MS14153 9TC2
European standardsSAE standardsAll U.S. aircraft OEM’sMost European aircraft OEM’s
6TC9TC
TEMPoC
+25-54+90
+121
MIN ULTTRIP
110%110%100%
90%
MAX ULTTRIP
145%165%145%145%
TRIP TIME - SECONDS
200%4-206-403-203-20
500%.40-2.0.55-3.5.33-1.7.33-1.7
1000%.10-.53.15-.80.08-.40.08-40
Characteristics
spma 53-51 ,1 :noitarbilaCspma 02-2 :noitarbilaC
5
9TC146TC14 Panel Mounting Panel Mounting.125±.005 Dia. .125±.005 Dia.
.375±.005.485
±.005 Dia..485
±.005 Dia..375±.005
#8-32 UNC
.250 .250
.047
#8-32 UNC
1.840
.624
1.030MAX 1.218
.500
.765
1.100MAX.
.802
2.415
1.100MAX.
15/32 .32UNS 2A 15/32 .32
UNS 2A
1.350
.047
.765
1.030MAX. 1.218
TEMPoC
+25-54+90
+121
MIN ULTTRIP
110%110%100%
90%
MAX ULTTRIP
145%165%145%145%
TRIP TIME - SECONDS
200%4-206-403-203-20
500%.40-2.0.55-3.5.33-1.7.33-1.7
1000%.10-.53.15-.80.08-.40.08-40
† Single phase max. ult. trip values apply with other two phases carrying 100% ofrated current.
† Single phase max. ult. trip values apply with other two phases carrying 100% ofrated current.
Vibration* ................................Mechanical Shock ...................Acceleration ............................Weight .....................................
10 G’s minimum, 50-500 Hz50 G’s10 G’s6TC14 - 65 gm max.9TC14 - 110 gm max.
Interrupt Current
Endurance
SensataNumber6TC14-26TC14-21⁄26TC14-36TC14-46TC14-56TC14-71⁄26TC14-106TC14-156TC14-20
Voltage Drop(max.)**
1.100.250.250.250.250.25
SensataNumber9TC14-19TC14-159TC14-209TC14-259TC14-309TC14-35
Voltage Drop(max.)
0.700.500.400.370.35.192.176.176.176
2-20 amps: 2000 amps at 120 VAC, 400 Hz1, 15-35 amps: 2000 amps at 120 VAC, 400 Hz
2500 cycles ................................... 120 VAC, 400 Hz Inductive5000 cycles ................................... 120 VAC, 400 Hz Resistive5000 cycles ................................... Mechanical, no load
* Other vibration levels available. Contact factory for details.
** Max voltage drop at nominal rated current.(25 amp 6TC pending qualification.)
Approximate Time-Current Curves - 6TC and 9TC Circuit Breakers
-54oC MAXIMUM TRIP CURVE
+25oC TRIP BAND
+90oC MINIMUM TRIP CURVE
1000
100.01 0.1 1.0 10 100 1000
Trip Time in Seconds
% R
ated
Cur
rent
165%145%110%100%
35
6/9TC
5 AMP RATING SHOWN35 AMP RATING SHOWN
2TC49 Series“Dual Safety™” Circuit Breakers
Features
Overview
• Extension of 2TC series
• Redundant protection in hard fault catastrophic conditions
• Separable link feature
• Case color distinguishes 2TC49 from 2TC series
• Uses less space and weighs less than other circuit breaker packages
• Rating 21⁄2 -15 amps
The 2TC49 “Dual Safety™” circuitbreaker represents a re�nementin electrical control and circuitprotection. The 2TC dual safetycircuit breaker incorporates afusible element in a standard 2TC(MS 3320) package size toprovide redundant protection inhard fault conditions.
“Hard Fault” Tripping
The 2TC dual safety circuitbreaker operates identically to astandard circuit breaker under allnormal conditions, including
short circuit. In the event ofcircumstances which disable theinternal circuit breakermechanisms, such that the deviceis able to carry current but unableto clear an overload via its normalmeans, the dual safety elementacts as a built in fuse to provideredundant circuit protection.
The key part in the dual safetydesign is a two part currentcarrying element joined by aspecial alloy. The geometry andmaterial of the element determineits heating properties. The
elements heating properties areslower than the bimetal sensorbut faster than the smoke curveof the wire the rating is designedto protect. In the case where thestandard mechanism is disabledor cannot operate normally, theseparable element “fuses” open,interrupting the current.
The bene�ts of the dual safetydesign result in calibratedovercurrent protection (basedon fuse times) and speci�ed postfuse dielectric properties forsystem and human protection.
2TC49“Dual Safety” Circuit Breaker
Approximate Time-Current Curves - 2TC49 Circuit Breakers1000
100
% R
ated
Cur
rent
0.01 0.1 1 10 100 1000Trip Time in Seconds
-54oC MAXIMUM TRIP CURVE
+25oC TRIP BAND
+121oC MINIMUM TRIP CURVE
Vibration* ..................................Mechanical Shock .....................Acceleration ..............................Weight .......................................
Interrupt Current
Endurance
21⁄2 - 15 amps: 6000 amps at 28 VDC21⁄2 amps: 2800 amps at 120 VAC, 400 Hz3 - 15 amps: 2500 amps at 120 VAC, 400 Hz
2500 cycles ................................ 120 VAC, 400 Hz Inductive5000 cycles ................................ 120 VAC, 400 Hz Resistive2500 cycles ................................ 30 VDC, Inductive5000 cycles ................................ 30 VDC, Resistive10,000 cycles ............................. Mechanical, no load
* Other vibration levels available. Contact factory for details.
10 G’s minimum, 50-500 Hz50 G’s10 G’s2TC49 - 25 gm max.
Voltage Drop(max.)**
0.700.550.350.300.28
SensataNumber2TC49-21⁄22TC49-32TC49-5
2TC49-71⁄22TC49-10
** Max. voltage drop at nominalrated current
Link Separation CharacteristicsMaximum circuit breaker link separation times for locked contactcondition as a function of overload
21⁄23571⁄210
400%–––
69.060.0
500%––
95.028.035.0
600%34.034.036.014.020.0
700%20.020.018.08.0
12.0
800%13.013.010.04.07.0
900%9.09.06.03.54.0
1000%6.06.03.52.02.5
Am
p Ra
ting
% Overload Rated Current
Time (seconds)
Post-short circuit dielectric ......................................1125 VAC Min (1mA)Post-link separation dielectric .......................................... 900 VAC (1mA)
TempoC+25-54
+121
Min ULTTrip
115%115%
90%
Max ULTTrip
138%165%138%
200%5-207-403-13
500%.5-2.0.6-3.0
.33-1.1
1000%.12-.53.16-.8.07-.3
Trip Time – Seconds
Calibration: 21⁄2–15 amps
2TC49
Characteristics
.562
.083
.073
.036
.026
CASE COLOR BLUE
5 AMP RATINGSHOWN.781
.719
CENTER LINE OF MOUNTING KEY .370-.380
Panel Mounting.125±.005 Dia.
.445±.005 Dia.
.375±.005
.400 DIA.
.390BREAKER IN CLOSEDPOSITION
7/16-32NS-2A THREAD
BREAKER IN OPEN POSITION
BLACK
.250
.750 MAX.
#8-32 UNC
.250
.055
.040
1.3121.218
1.030 MAX.
47o–43o
.281
.219.531.469
“Dual Safety™” 2TC49
5 AMPRATING SHOWN
5
165%138%115%
90%
5TC Series Single Phase, Ambient Compensated
Features
• Trip free
• Current ratings (20 - 50amps)
• Coordinated ratings
• High vibration resistance
• High interrupting capacity
Overview
Klixon® single-phase TC devicesrepresent “state-of-the-art” protection for today’s aerospacepower systems.
Coordination
The single phase 5TC rating iscoordinated so it will trip beforeanother circuit breaker, twice itsrating, in the event of a fault of
The Klixon trademark has set thestandard for aerospace circuitbreakers. The TC series o�ers theendurance and reliability requiredby exacting military speci�cationsand is available in standard currentratings from 20 – 50 amperes.
Ambient Temperature Compensation
The 5TC serves as an ambientcompensated circuit breaker. Itpermits system designers tospecify smaller gauge wire wherethe circuit breaker and wiring areexposed to di�erent ambienttemperatures. They are especiallysuited for application whereambient temperature exceeds the160oF (71oC) maximum of non-
ambient compensated thermalcircuit breakers. The 5TC seriesmay be applied where operatingtemperatures are as high as250oF (121oC), with no deratingof the circuit breaker. Thiseliminates the need for coolingair and allows substantial weight,space and cost savings.
Options
• Longer pushbuttons• Standard or auxiliary switch
con�guration• Terminal barriers
Qualifications
ASNE0732-005 ...................5TC65NSA931321 .........................5TC50
5TC505TC65
up to 600 amps let throughcurrent. This results in improvedoverall equipment performance,since only the smallest faultedcircuit is interrupted, while larg-er circuits remain operational.
Calibration: 20-50 Amps
Characteristics
Temp oC
+23-54+70
+125
Min. ULT.Trip
110%110%105%90%
Max. ULT. Trip
145%165%145%145%
200%
2-1870 sec. max.1.5 sec. min.1.5 sec. min.
500%
.15 - 2.5
.15 - 2.5
.15 - 2.5
.15 - 2.5
1000%
.045 - .6
.045 - .6
.045 - .6
.045 - .6
Trip Time - Seconds
The above calibration chart is representative of a standard commercial device. Sensata offers specific variants with similarperformance dependant on military or customer specifications. Temperatures are ±5oC.
Performance
Vibration .....................................Mechanical Shock ........................Acceleration .................................Weight
Standard Device .....................Auxiliary Device .....................
10 G’s minimum, 80-500 Hz50 G’s10 G’s
53 grams (w/o hw), 58 grams (w/hw)55 grams (w/o hw), 59 grams (w/hw)
Interrupting Capacity20-50 amps......4000 amps at 28 VDC20-50 amps..... 2000 amps at 115 VAC,400 Hz
Endurance2500 cycles...........115 VAC, 400 Hz,Inductive2500 cycles...........28 VDC, Inductive2500 cycles...........28 VDC, Resistive5000 cycles...........Mechanical, no load
Amp Rating20253550
Voltage Drop (max)*0.1500.1500.1500.120
.01 .1 1 10 100 1000Trip Time in Seconds
20
10
% R
ated
Cur
rent
5
Approximate Time-Current Curves - 5TC Circuit Breakers
2
1
+23oC TRIP BAND -54oC MAXIMUM TRIP CURVE
+125oC MINIMUM TRIP CURVE
1.653 MAX.
1.29950 AMP RATINGSHOWN
.768 MAX. .622 MAX.
.378
1.9202.170 MAX.
.827
.059
1.102 MAX.1.575
.260
Panel Mountingø .492 ±.005 ø .138 ±.005
.375 ±.005
5TC
50
* Max. voltage drop at nominal rated current
Optional Aux. Switch
6752 Series Circuit Breakers Ambient Compensated Single & Three Phase High Short Circuit Capacity
Features
• Useable on large electrical systems – 6000 amperesinterrupting capacity
• Circuit protection una�ected by temperature�uctuation – ambient compensated from-65 oF to +250 oF
• Only faulted line circuits opened – coordination of ratings ensures that branch circuit breakers trip�rst under fault conditions
• Long trouble-free operation – 20,000 operating cycles
• Military approved
• High amp devices available (65A & 90A)
Overview
The Klixon 6752-12 and -300series thermal-magnetic circuitbreakers are ambient compensatedand trip-free. They are designedand manufactured to meet themore stringent military standardsof today’s jet aircraft, speci�callyMIL-DTL-22715.
The higher short circuit capacity, vibration resistance and longercycling life of the 6752-12 and-300 series exceed previousmilitary standards. In addition,the 6752-12 and -300 seriesprovide ambient compensation,fault coordination of all ratings,and an option for auxiliary circuits.
High Short Circuit CapacityA deionizing grid and magneticassist enable the 6752-12 and-300 series to successfullyinterrupt four fault currents of6000 amperes – two at sea leveland two at 60,000 feet – on either a120 VAC , 400 Hz system or a 30 VDCsystem.
Ambient TemperatureCompensationSubstantially una�ected byambient temperature, the 6752-12and -300 series circuit breakersmaintain their performance capa-bilities by means of a thermalcompensator in the temperaturerange of -54 oC to+121 oC.
Coordination
The 6752-12 and -300 seriesbreaker ratings are coordinatedso any rating will trip beforeanother rating, twice its capacity,in the event of a fault. Thisresults in improved over-allequipment performance, sinceonly the smallest faulted circuitis removed while larger circuitsremain in operation.
Auxiliary Circuit
The 6752-12 and -300 series areavailable with auxiliary switch.For part numbers and character-istics, please consult the factory.
Number
6752-12-21⁄2
6752-12-5
6752-12-71⁄2
6752-12-10
6752-12-15
6752-12-20
6752-12-25
6752-12-35
6752-12-50
MS Number
MS 24571-2
MS 24571-5
MS 24571-7
MS 24571-10
MS 24571-15
MS 24571-20
MS 24571-25
MS 24571-35
MS 24571-50
MS 24571-2V
MS 24571-5V
MS 24571-7V
MS 24571-10V
MS 24571-15V
MS 24571-20V
MS 24571-25V
MS 24571-35V
MS 24571-50V
MIL Qualification
When ordering MS 24571-XX(V) style breaker bySensata part number, designator must includeS.R. 12507-356Example: 6752-12-21⁄2 is S.R. 12507-356
6752-126752-300
Sensata
Single Phase
6752-12-21⁄26752-12-56752-12-71⁄26752-12-106752-12-156752-12-206752-12-256752-12-356752-12-50
Three Phase
6752-305-21⁄26752-305-56752-305-71⁄26752-305-106752-305-156752-305-206752-305-256752-305-356752-305-50
Voltage DropMax**
0.600.400.300.250.250.250.250.250.25
Sensata Number
** Max voltage drop at nominal rated current.
TEMPoC
+25-54+93
+121
MIN ULTTRIP
110%110%105%100%
MAX ULTTRIP
138%160%138%138%
TRIP TIME - SECONDS
200%12-6515-6512-6512-65
400%2.3-102.3-102.3-102.3-10
1000%.33-1.4.33-1.4.33-1.4.33-1.4
† Single phase max. ult. trip values apply with other two phases carrying 100% ofrated current.
6752-12 Calibration: 21⁄2 - 50 amps
200%12-3214-3616-4018-4220-4520-4820-5020-5320-55
400%2.3-6.52.5-6.52.5-7.0
2.7-7.752.7-8.02.7-8.02.7-8.02.7-9.52.7-8.0
1000%.32-1.1.45-1.1.34-1.1.45-1.2.36-1.2.36-1.2.36-1.2.36-1.2.36-1.4
6752-12-21⁄26752-12-56752-12-71⁄26752-12-106752-12-156752-12-206752-12-256752-12-356752-12-50
6752-12
Characteristics
6752-305
2.200 MAX.1.810
.905
.750 MAX..375
.312 TERMINAL WIDTH
Ø.468
#6–32UNC SCREWS
Ø.418 .093
.250
2.18
.250
2.37MAX.
LINE TERMINAL1.19
.59445o
#8–32UNC–2A X .250 LONGPHILLIPS HEAD SCREW &
SPLIT LOCKWASHER.046 THICK (2 PLACES)
2.200 MAX.1.810
.905 #6–32UNC SCREWS
2.270MAX.
.750
1.500
.125.625 DIA.
.550
2.1802.370
2.470
45o .5941.190 #8–32UNC SCREWS
.804.250
10,000
1000
100
% R
ated
Cur
rent
160%100%
.01 .10 1 10 100 1000 10,000Trip Time in Seconds
Approximate Time-Current Curves 6752 Circuit Breakers
6752
5
5 AMP RATING SHOWN
6752-305 Calibration: 21⁄2 -50 amps
Vibration* .............................Mechanical Shock ................Acceleration .........................Weight ..................................
Interrupt Current
Endurance
21⁄2 - 50 amps: 6000 amps at 30 VDC (6752-12 only)21⁄2 - 50 amps: 6000 amps at 120 VAC, 400 Hz21⁄2 - 50 amps: 4200 amps at 205 VAC, 400 Hz
5000 cycles ................................ 120 VAC, 400 Hz Inductive5000 cycles ................................ 120 VAC, 400 Hz Resistive10,000 cycles ............................. Mechanical, no load20,000 cycles ............................. Total* Other vibration levels available. Contact factory for details.
10 G’s minimum, 50-2000 Hz25 G’s10 G’s6752-12 – 91 gm max.6752-305 – 292 gm max.
Performance Characteristics
Sensata Number
6752-100 Series Circuit Breakers Ambient Compensated Single & Three Phase High, Short Circuit Capacity
6752-100
Features
• Current ratings from 50-100 amps
• Proven reliability and performance of the 6752 seriescircuit breaker
• Usable on large electrical systems – 6000 amperesinterrupting capacity
• Circuit protection una�ected by temperature �uctuations– ambient compensated from -40oF to +160oF
• Military approved (including high sine vibration capability)to MS 25361 and MS 25361 (V)
Overview
The Klixon® 6752-100 seriesthermal-magnetic circuit breakersare ambient compensated andtrip-free. These circuit breakersare designed and manufactured tomeet stringent military standardswith the reliability of the original6752 design. The 6752-100 issimilar to the 6752-12 in size, andincludes current ratings rangingfrom 50-100 amps.
The higher short circuit capacity, vibration resistance and longercycling life of the 6752-12 and -300series exceed previous militarystandards. In addition, the6752-12 and -300 series provideambient compensation, faultcoordination of all ratings, and anoption for auxiliary circuits.
High Short Circuit Capacity
A deionizing grid and magneticassist enable the 6752-100 series tosuccessfully interrupt four fault6000 amp currents, two at sea leveland two at 60,000 feet, on either a120 VAC , 400 Hz system or a 30 VDCsystem.
Ambient TemperatureCompensation
The 6752-100 series circuitbreakers maintains itsperformance capabilities bymeans of a thermal compensatorin the temperature range of-40oC to +70 oC.
Sensata Number6752-100-506752-100-606752-100-706752-100-756752-100-806752-100-906752-100-100
MS NumberMS 25361-50MS 25361-60MS 25361-70MS 25361-75MS 25361-80MS 25361-90MS 25361-100
Sensata Number6752-102-506752-102-606752-102-706752-102-756752-102-806752-102-906752-102-100
MS NumberMS25361-50VMS25361-60VMS25361-70VMS25361-75VMS25361-80VMS25361-90VMS25361-100V
MIL Qualification
Characteristics
Envelope Dimensions
TempoC+25-40+70
Min ULTTrip
105%125%
70%
Max ULTTrip
138%165%125%
200%15-6515-6515-65
400%2-102-102-10
1000%1.41.41.4
Trip Time – Seconds
6752-100 Calibration
10,000
1000
100
0.01 .01 1 10 100 1000Trip Time in Seconds
Approximate Time-Current Curves – 6752-100 Circuit Breakers
10
% R
ated
Cur
rent
UPPER LIMITAT –40oC
LOWER LIMITAT 70oC
165%138%105%70%
2.189 MAX.
1.083
.750 MAX.
6–32UNC–2BSELF-LOCKING NUT(2 REQ’D)(.312 MIN DEPTH)
.911
.9014X R .0901.8171.807
(CLOSED POSITION) .250 – 28UNF-2B INTEGRALALL-METAL LOCKING NUT(2 REQ’D)
MS35308-303.250 – 28UNF-2A X .500LCAP SCREW WITHFLAT WASHER(2 REQ’D)
DETAIL
.060 min.
.115
.035
.460MIN.
.427
.395
1.930MAX.
2.357
2.560MAX.
.735
1.470
47o43o
6752-100
#6-32 UNC SCREWS
Vibration* .....................................Mechanical Shock .....................Acceleration ................................Weight ...........................................
Interrupt Current
Endurance
120 VAC, 400 Hz: 3500 amps28 VDC: 6000 amps
5000 cycles .................................. 120 VAC, 400 Hz Resistive5000 cycles .................................. 120 VAC, 400 Hz Inductive5000 cycles .................................. 28 VDC, 400 Hz Resistive2500 cycles .................................. 28 VDC, 400 Hz Inductive5000 cycles .................................. no load
* Other vibration levels available. Contact factory for details.
10 G’s minimum, 50-2000 Hz30 G’s10 G’s0.25 lbs (114 gm) max.
Performance Characteristics
3TC7 Series Single Phase, Non Ambient Compensated, High Short Circuit Interrupting Capacity
Features
Overview
• Lightweight
• Miniature size
• High interrupting capacity
• High vibration resistance
• Available in 5-35 amperes
Detailed Performance Data
6000 Amperes at 30VC
120 VAC, 400 Hz Inductive120 VAC, 400 Hz Resistive30 VDC, Inductive30 VDC, ResistiveMechanical, no load10 G’s30 G’s peak10 G’s39 gm65,000 ft
3500 Amperes at120 VAC, 400 Hz2,500 Cycles5,000 Cycles2,500 Cycles5,000 Cycles5,000 Cycles
Interrupting Capacity
Endurance
VibrationMechanical ShockAccelerationWeightOperating Altitude
The Klixon 3TC7 style circuitbreaker is a lightweight, highperformance, non ambienttemperature compensated circuitbreaker that is well suited foraircraft, avionics and electricalsystems. The 3TC7 series featuresa trip free design that preventsthe circuit breaker from beingclosed manually on overloads.The 3TC7 interrupting a 6,000Acircuit at 30 VDC, or 3,500A circuitat 120 VAC, 400 Hz.
The Klixon trademark continues toset the standard for lightweightcon�gurations and o�ers theendurance and reliability requiredby exacting military speci�cations.The 3TC7 is currently available in5-35 amperes.
3TC7
MS Number
MS25244-5
MS25244-71⁄2
MS25244-10
MS25244-15
MS25244-20
MS25244-25
MS25244-30
MS25244-35
Amp Rating
5
71⁄2
10
15
20
25
30
35
Voltage Drop
.25
.25
.25
.25
.25
.25
.25
.25
Sensata Number
3TC7-5
3TC7-71⁄2
3TC7-10
3TC7-15
3TC7-20
3TC7-25
3TC7-30
3TC7-35
35
35 AMP RATING SHOWN
.750 MAX.
BREAKER IN OPEN POSITION
WHITE
BLACK
BLACK
1.094MAX.
.078
.240
1.74
.704
1.86MAX.
.120
BREAKER IN CLOSED POSITION
Characteristics
Calibration
+25oC-40oC+71oC
Max Ult Trip
138%178%114%
200%
15 - 55 sec--
600%
1.0 - 3.5 sec--
Min Ult Trip
115%148%70%
400%
2.0 - 7.0 sec--
0.1 1 10 100 1000Trip Time in Seconds
1000
100
% R
ated
Cur
rent
10
Approximate Time-Current Curve 3TC7 Circuit Breakers
3TC7
.375 OF MOUNTING KEY C
ø .330
115%138%
1.49
MS25082-C21
MS35338-136
MS51957-41
7274 Series Circuit Breakers Low Amperage, High Performance
7274-2
Overview
Features
• Uses minimum space
• Light weight
• Ratings: 1/2 – 20 amperes
• Military approved
The 7274 series are small, lightweight, low amperage devices thatare speci�cally designed toprotect aircraft / aerospace cablesuch as �at ribbon, fusedmulti-conductor tape and printedcircuit conductors now being usedin lighter weight powerdistribution systems and compo-nents in airborne vehicles andequipment.
The 7274 series features a trip-free indicating-type reset button.Also, a “wiping action” contactdesign assures low voltage drop,faster trip time and high reliabilityin low voltage applications. Theyare available in standard ratingsfrom 1/2 – 20 amps.
A water resistant panel seal* designed to �t over the pushbutton actuator is available forapplications that require this typeof protection.
Options
Long push buttonsAuxiliary switchWaterproof panel sealHigh vibration
* Part number 14500-1 fits 7274-11 and other typeswith 15/32” mounting bushing. 14500-5 fits 7274-2 (7/16”).
Sensata Number
7274-2-1⁄2
7274-2-3⁄4
7274-2-1
7274-2-11⁄2
7274-2-2
7274-2-21⁄2
7274-2-3
7274-2-4
7274-2-5
7274-2-71⁄2
7274-2-10
7274-2-15
7274-2-20
MS Number
MS 26574-1⁄2
MS 26574-3⁄4
MS 26574-1
MS 26574-11⁄2
MS 26574-2
MS 26574-21⁄2
MS 26574-3
MS 26574-4
MS 26574-5
MS 26574-71⁄2
MS 26574-10
N/A
N/A
Sensata Number
7274-11-1⁄2
7274-11-3⁄4
7274-11-1
7274-11-11⁄2
7274-11-2
7274-11-21⁄2
7274-11-3
7274-11-4
7274-11-5
7274-11-71⁄2
7274-11-10
7274-11-15
7274-11-20
MS Number
MS 22073-1⁄2
MS 22073-3⁄4
MS 22073-1
MS 22073-11⁄2
MS 22073-2
MS 22073-21⁄2
MS 22073-3
MS 22073-4
MS 22073-5
MS 22073-71⁄2
MS 22073-10
N/A
N/A
Sensata Number
7274-4-1⁄2
7274-4-3⁄4
7274-4-1
7274-4-11⁄2
7274-4-2
7274-4-21⁄2
7274-4-3
7274-4-4
7274-4-5
7274-4-71⁄2
7274-4-10
7274-4-15
7274-4-20
MS Number
MS 26574-1⁄2A
MS 26574-3⁄4A
MS 26574-1A
MS 26574-11⁄2A
MS 26574-2A
MS 26574-21⁄2A
MS 26574-3A
MS 26574-4A
MS 26574-5A
MS 26574-71⁄2A
MS 26574-10A
N/A
N/A
Sensata Number
7274-69-1⁄2
7274-69-3⁄4
7274-69-1
7274-69-11⁄2
7274-69-2
7274-69-21⁄2
7274-69-3
7274-69-4
7274-69-5
7274-69-71⁄2
7274-69-10
7274-69-15
7274-69-20
MS Number
MS 22073-1⁄2V
MS 22073-3⁄4V
MS 22073-1V
MS 22073-11⁄2V
MS 22073-2V
MS 22073-21⁄2V
MS 22073-3V
MS 22073-4V
MS 22073-5V
MS 22073-71⁄2V
MS 22073-10V
N/A
N/A
7274-70 Qualified to MS 26547L for ratings 1/2 amp to 10 amp.
7274-4 7274-11 and 7274-69
Characteristics
3 3
Vibration* .....................................Mechanical Shock ........................Acceleration .................................Weight ..........................................
Interrupt Current
Endurance
1/2 - 5 amps: unlimited at 28 VDC71⁄2 - 15 amps: 2000 amps at 28 VDC1/2 - 11⁄2 amps: 800 amps at 120 VAC, 400 Hz2 - 5 amps: 800 amps at 120 VAC, 400 Hz71⁄2 - 20 amps: 500 amps at 120 VAC, 400 Hz
2500 cycles ................................. 120 VAC, 400 Hz Inductive5000 cycles ................................. 120 VAC, 400 Hz Resistive2500 cycles ................................. 30 VDC, Inductive5000 cycles ................................. 30 VDC, Resistive5000 cycles ................................. Mechanical, no load
* Other vibration levels available. Contact factory for details.
10 G’s minimum, 50-500 Hz35 G’s10 G’s minimum7274-2: 28 gm max.7274-4: 28 gm max.7274-11: 33 gm max.7274-69: 33 gm max.
TempoC+25-55+71
Min ULTTrip
115%135%
90%
Max ULTTrip
150%180%130%
200%2-20
––
500%.16-1.2
––
1000%.046-.8
––
Trip Time – Seconds
Calibration: 1/2–20 amps
Sensata Number
7274-XX-1⁄27274-XX-3⁄47274-XX-17274-XX-11⁄27274-XX-27274-XX-21⁄27274-XX-37274-XX-47274-XX-57274-XX-71⁄27274-XX-107274-XX-157274-XX-20
Voltage Drop(Max.)**
2.001.451.100.750.750.700.550.450.350.300.280.250.25
**Max voltage drop at nominal rated current.
1000
100
0.01 0.1 1 10 100 1000Trip Time in Seconds
Approximate Time-Current Curves 7274 Circuit Breakers
10
% R
ated
Cur
rent 180%
150%115%90%
UPPER LIMIT AT -55oC
7274-2 and 7274-4 7274-11 and 7274-69
.750
Panel Mounting.125±.005 Dia.
.445±.005 Dia.
.375±.005
Panel Mounting.125±.005 Dia.
.485±.005 Dia.
.375±.005.562
.562
.445
.032
.419
.744
.388
.110
.078KEYWAY WASHER DETAIL
PUSH PULL BUTTON POSITION WITHCIRCUIT BREAKER TRIPPED (OFF)
7/16-32NS-2 THREAD
.440
.191.277 MAX.
.100
.213
.359
1.302
1.115
45o.593
#6–32 UNC SCREWS
MOUNTING NUT
LOCK WASHER
KEYWAY WASHER
BACK-UP NUT
LOCK WASHER
PHILLIPS RECESSPAN HEAD SCREW .050 DIA
HOLEAUXILIARY TERMINAL 7274-4 ONLY
15/32-32NS-2 THREAD
MOUNTING NUT
LOCK WASHER
KEYWAY WASHER
LOCK WASHER
PHILLIPS RECESSPAN HEAD SCREW
.750
.562
.032
.078KEYWAY WASHER DETAIL
45o
.203
.718
.472
.390
.093
.410DIA..100
.255
.250
1.707
1.450
.480
.191
.703#8–32 UNC SCREWS
PUSH PULL BUTTON POSITION WITHCIRCUIT BREAKER TRIPPED (OFF)
7274
3 AMP RATING SHOWN3 AMP RATING SHOWN
LOWER LIMIT AT 71oC
7277 Series Circuit Breakers Low Amperage, General Application
Overview
Features
The 7277 series is designed for applications that do notrequire the tighter performance characteristics andapprovals of our military circuit breakers.
• Small size
• Light weight
• Inexpensive
• Auxiliary switch
• Longer push buttons
The 7277 series circuit breaker isphysically and electrically identicalto the 7274-2 style circuit breaker,with the exception that the 7277series has wider calibration limits.
Originally developed as an alterna-tive to slow blow fuses, the tripfree 7277 is used extensively asprimary electrical circuit protec-tion on general aviation aircraft.
TempoC+25
Min ULTTrip
110%
Max ULTTrip
150%200%2-35
500%.15-1.70
1000%.028-.55
Trip Time – Seconds
Calibration: 1/2–20 amps*
* Performance characteristics and dimensions are equivalent to 7274 which arefound on page 19.
SensataNumber
7277-2-1⁄27277-2-3⁄47277-2-17277-2-11⁄27277-2-27277-2-21⁄27277-2-37277-2-47277-2-57277-2-71⁄27277-2-107277-2-157277-2-20
**Max voltage drop at nominal rated current.
1000
100
.01 .1 1 10 100 1000Trip Time in Seconds
Approximate Time-Current Curves 7277 Circuit Breakers
% R
ated
Cur
rent
150%115%
AmpereRating
1/23/4111⁄2221⁄234571⁄2101520
Max. Drop**(volts)
2.001.451.100.750.700.500.330.300.250.200.150.150.15
Ordering Information
Code System
7277 – 2 – 5
Basic type
Derivative
Ampere rating(i.e., 5 = 5 amps,71⁄2 = 71⁄2 amps)
7277 –1: Aux. switch version
The wider calibration limits of the7277 has also resulted inapplications including protectionfor data processing andtelecommunications equipment,computers, �ight simulators,construction, material handlingand other industrial,electronicequipment.
For use on trainer / simulator applications where all breakersare operated on low amperecontrol current, di�erent ampererating inserts (amp ratings on topof push button) can be ordered.Use TI part number 27515.
(Refer to 7274-2 and 7274-4dimensions on previous page.)
7277-2
7277-1
20TC Series Circuit Breakers Rocker Actuated Switch Type
Overview
Features
• Versatile rocker actuator – snap-on, switch type in various styles andcolors for panel mounting
• Provides dual function – “ON/OFF”circuit switching and protection
home appliances, o�ce reproduc-ing and calculating machines, anddata processing equipment.
Several di�erent types ofactuators are available. Thetranslucent actuator permits quickidenti�cation of the actuatorposition under low ambientlighting conditions by emitting asoft glow from a light source, suchas an edge lighted panel. Colored
The Klixon 20TC series circuitbreaker o�ers the advantages ofintegrating an on/o� switch and acircuit protector in a trim,compact package. The snap-onactuators are available on requestin a variety of colors, styles andindication markings. They aredesigned to provide a stylishconsole appearance to the panelsof light aircraft, pleasure boats,
actuators will be hot letterstamped in white. White andtranslucent actuators will bestamped in black.
The growing demand for a highly stylized and aesthetic panelappearance has generated theneed for the 20TC. The basicmechanism has been proven forreliability in a wide variety ofapplications.
Envelope Drawings
.655 MIN PANEL
OPENING
#6-32 NC-2 B (2 PLACES).750 MAX.
.375
1.620
1.375 MAX.
.250 OPERATING DISTANCE
1.200 MIN.PANEL OPENING
.420
1.173
1.642
#8-32 UNC-2A RD HEAD SCREWAND SPLIT L’ WASHER
Rocker Button Options(SR12507-156-X)
-1 -2-3-4-5-6-7-8-9-10-11-13-16-18-19-20-21-22-23-25-26-27-28-29-30-33-34-35
PUSH ON / LNDG LITEPUSH ON / NAV LITEPUSH ON / ANTI COLLPUSH ON / PITOT HEATPUSH ON / BOOST PUMPPUSH ON / GLIDE SLOPEPUSH ON MKR BCNPUSH ON / STROBE LITEOFFOFF“SR TO INVERT MARKING”PUSH ON / ROT BCNPUSH ON / ELEV TRIMPUSH ON / RADIO MASTERPUSH ON / LDG LITEON / OFFOFF“COLORED BOX”OFFON /OFFOFF / ONPUSH ON / LOW BOOSTPUSH ON / HIGH BOOSTPUSH ON / WX RADARPUSH ON / PROP DE ICEPUSH ON / STBY VACNO ACTUATORON / OFF
Code System
20TC2 – A A – 5
Basic typeSee dimensionaldrawing
Actuator StyleA = Serrated
Actuator ColorA = White
(Serrated& Smooth)
Ampere Rating
3 =5 =
71⁄2 =10 =15 =20 =25 =30 =35 =
3 amps5 amps71⁄2 amps10 amps15 amps20 amps25 amps30 amps35 amps
20TC2
Note: Performance Characteristics similar to 7270/7271 devices on page 22 and 23.
7270 & 7271 Series Circuit Breakers Miniature Aircraft
Features
• Trip free
• Snap-acting thermal element
• Simplicity of design
• High rupture capacity – 3500 amps,120 VAC, 400 Hz, 4000 amps, 30VDC
• Light weight
• Small size
Overview
The Klixon 7270/7271 seriescircuit breakers were designed toutilize less space behind the panelspace while protecting wire andcable in aircraft and groundsupport equipment on either120 VAC, 400 Hz or 30 VDCsystems. The units are availablewith neck mounting (7270-1 and7271-8) or standard cover plate(7270-7 and 7271-3). In each ofthese Klixon circuit breakers, thebi-metallic element assuresuniform current distributionthroughout its responsive area.This design reduces current den-sity at the critical areas, resultingin an element having a muchhigher interrupting capability thanconventional design. Inherentlyresistant to shock and vibration,the Klixon disc element is capableof precise calibration settings andwill retain the initial calibrationwithin close tolerances through-out the service life of the breaker.Both circuit breakers haveconventional actuator action; i.e.,the toggle actuator on the 7270moves to the OFF position for tripindication and the button of the7271 pops out. A standard blackbutton with a white collar is used.
Optional Covers
Sensata Number
7270-1-37270-1-57270-1-71⁄27270-1-107270-1-157270-1-207270-1-257270-1-307270-1-357270-7-37270-7-57270-7-71⁄2
MS Number
N/AMS 24509-A-5MS 24509-A-71⁄2MS 24509-A-10MS 24509-A-15N/AN/AN/AN/AN/AMS 24509-B-5MS 24509-B-71⁄2
SensataNumber
7270-7-107270-7-157270-7-207270-7-257270-7-307270-7-357271-3-37271-3-57271-3-71⁄27271-3-107271-3-157271-3-20
MS Number
MS 24509-B-10MS 24509-B-15N/AN/AN/AN/AN/AMS 24510-B-5MS 24510-B-71⁄2MS 24510-B-10MS 24510-B-15N/A
SensataNumber
7271-3-257271-3-307271-3-357271-8-37271-8-57271-8-71⁄27271-8-107271-8-157271-8-207271-8-257271-8-307271-8-35
MS Number
N/AN/AN/AN/AMS 24510-A-5MS 24510-A-71⁄2MS 24510 A-10MS 24510-A-15N/AN/AN/AN/A
Qualifications
#6-32 NC-2ASELF-LOCKING NUT
.313 .484
.188 .750 MAX.
2.188
7271-3
7270-7
#6-32 NC-2ASELF-LOCKING NUT
.313 .484
.188 .750 MAX.
2.188
7270-7
7271-8
7271-3
7270-1
5
TempoC+25
-40+71
Min ULTTrip
115%
138%80%
Max ULTTrip
145%
175%125%
200%40-12040-10010-70
––
400%3-263-22
.75-7.0––
600%1-121-10
.25-2.5––
Trip Time – Seconds
Vibration* .....................................Mechanical Shock .....................Acceleration ................................Weight ..........................................
Interrupt Current
Endurance
4000 amps, 30 VDC3500 amps, 120 VAC, 400 Hz
200 cycles ................................... 30 VDC Inductive5000 cycles ................................. 120 VAC, 400 Hz Inductive5000 cycles ................................. 120 VAC, 400 Hz Resistive5000 cycles ................................. 30 VAC, 400 Hz Resistive10,000 cycles .............................. Mechanical, no load* Other vibration levels available. Contact factory for details.
10 G’s minimum, 50-500 Hz30 G’s10 G’s7270-1 – 39 gm max.7271-8 – 39 gm max.
1000
100
0.01 0.1 1 10 100 1000Trip Time in Seconds
Approximate Time-Current Curves 7270 and 7271 Circuit Breakers
% R
ated
Cur
rent 175%
145%115%80%
10
Characteristics
7270-1
UPPER LIMIT AT -40oC
LOWER LIMIT AT 71oC
SensataNumber
7270’s 7270-x-37270-x-57270-x-71⁄27270-x-107270-x-157270-x-207270-x-257270-x-307270-x-35
Voltage Drop(Max.)**
0.750.650.50.50.50.50.50.50.5
**Max voltage drop at nominal rated current.
SensataNumber
7271’s7270-x-37270-x-57270-x-71⁄27270-x-107270-x-157270-x-207270-x-257270-x-307270-x-35
Calibration: 3-35 amps
Rating
3 amps5 amps71/2-35
––
7271-8
55o ±7o.609
BREAKER IN“ON” POSITION
BREAKER IN “OFF”(OR TRIPPED) POSITION
WASHER .250
.844
1.313
.375
.375
45o
.906
THE CONFIGURATION AND SIZE OF ALL7270/7271 SERIES CIRCUIT BREAKERS, FROMTHE TOP PLATE DOWN, ARE THE SAME..750
1.375
.375.093DIA.
AMP RATING
MOUNTING NUT
WASHER KEYWAY
15/32-32NS-2A THREAD
.094
.188
#8-32 UNCSCREWS
DIMENSIONS IN INCHES
1.375
.750 MAX.
.375
BREAKER IN “OFF”(OR TRIPPED) POSITION BREAKER IN
“ON” POSITION
.718 .593
.468-32NS-2A THREAD
.100 DIA.
45
#8-32 UNC SCREWS.531
.806
.8431.218
1.313
7270/7271
5
5 AMP RATING SHOWN
3SB Series Simulator Circuit Breakers
Features
• Low amperage / fast trip response
• High performance
• Packaged in Military Standard con�guration
• Tactile feel equivalent to industryaccepted aircraft circuit breakers
• Lower total system cost
Overview
The 3SB Series Simulator CircuitBreaker has been developed bythe Precision Products Group ofSensata Technologies to meet thegrowing needs of the commercialand military simulator industry.With more and more training nowbeing conducted on simulatorsdue to the high operational costsof live training, the realism andcomplexity of tomorrow’ssimulators will require a circuitbreaker that can provide the same“look and feel” of industryaccepted circuit breakers,creating a superior trainingenvironment.
3SB electromechanical devices provide fast trip response withlow current draw at 28 VDC, andare packaged in a standard
MS26574 style thermal circuitbreaker con�guration foradaptability to aircraft cockpitpanel mounting. This fasttrip/low current performanceprovides the opportunity forsystem level savings by enablingthe designer to potentially downsize the system power source.This eliminates expensive I/Oboards or other electronics whilealso reducing the amount ofcabling required.
Changes in training schemesnormally entail system rewiringto recon�gure the simulator,which becomes labor intensiveand costly. With theincorporation of the 3SB device,training changes can easily beachieved through system
software, without the time andcost associated with rewiring.Sensata’s simulator circuit breakersalso provide the same tactile feelas standard MIL quali�edbreakers to achieve superiortraining realism.
Klixon circuit breakers o�er the �exibility of ordering replaceableampere rating inserts. They areattached to the top of the pushbutton actuator, to match thecurrent rating used in the actualaircraft. These inserts can berotated within the push button tomeet your cockpit con�gurationneeds. An optional auxiliaryswitch for remote indications,along with a variety ofconnection alternatives, are alsoavailable.
3SB4
3SB2
3
TEX
AS
INST
RUM
ENTS
MA
DE
IN U
.S.A
.
3
TEX
AS
I NST
RUM
ENTS
MA
DE
IN U
.S.A
.
Characteristics
3SB2 3SB4
.750
.562
3 AMP RATINGSHOWN BREAKER IN
CLOSED POSITION
BREAKER IN OPEN POSITION
.395
.216
.100
.359
1.302
1.115
45o .296.593
ACCEPTSMS 51957-25SCREW ORSOLDER CONNECTION
BLACK
BLACK
WHITE.191
.451
.277 MAX.
1.420MAX.
Open and Reset Force ...
Calibration @ 25oC .........
Endurance ..........................
Vibration..............................
Shock ...................................
Acceleration ......................
Weight .................................
5 lbs. max.
200 mA max. current draw @28 VDC, 3 sec. max trip time
5000 mechanical cycles, no load1000 electrical trip cycles, minimumat 28 VDC
5 G’s maximum 50-500 Hz
5 G’s maximum
5 G’s maximum
30 grams maximum
Dummy Circuit Breakers
Sensata Technologies has developed a derivative of our7274 style circuit breaker expressly for applications insimulators, trainers and cockpit mock-ups.
7274-63D: Dummy breaker. Non-functional 7274-2 style
7274-64PS: Physical sample. 7274-2 style with opera-tional push button. Can measure continuity acrossterminals.
7274-65PS: Physical sample. 7274-11 style with opera-tional push button. Can measure continuity acrossterminals.
Part Numbering Code
3SB 2 - 1 - X
Basic Device Series CalibrationRequirements
Physical Characteristics2 = Standard device4 = Auxiliary switch21 = Standard device w/cover22 = Standard device w/green push button24 = Auxiliary switch w/green push button41 = Auxiliary switch w/cover
Ampere Rating InsertsN = No InsertB = Blank InsertD = “D” Rating InsertAMP = Amp Rating (i.e., “5”)
.750
.562
3 AMP RATINGSHOWN BREAKER IN
CLOSED POSITION
BREAKER IN OPEN POSITION
.216
.100
.359
1.302
1.115
45o .296.593
ACCEPTSMS 51957-25SCREW ORSOLDERCONNECTION
BLACK
BLACK
WHITE.191
.451
.277 MAX.
1.420MAX.
AUXILIARY TERMINALOR SOLDER CONNECTION
Ø .050 HOLE(2 PLACES)
3SB
.395
APD Series Circuit BreakersArc Fault Protection Device
Features
• Small and lightweight
• Current ratings 1-25 amperes
• Detects arcs over considerable distances
• Senses small arc currents in presence of large current loads
• Insensitive to RFI/EMI and cross talk signals
• Di�erentiates between normal load current and arc current
• Immune to load start up transients
• Retro�table – �ts into existing panel designs
Overview
The Arc Fault Circuit Breakerseries has been developed bySensata Technologies to meet theevolving needs of the aerospaceindustry. Traditional circuitbreakers were only designed todetect over-current (I2t)conditions. However, manyserious electrical incidents arecaused by low level arc faultconditions resulting fromdamaged or aging wire whichpresent generation circuitbreakers are not designed todetect or protect against.
Sensata recognizes the evolving requirements of the aerospaceindustry and the need forsupplemental arc fault protection.Sensata developed a small, lightweight package con�gurationbased around proven Klixon®commercial and mil-spec circuitbreaker designs, integrating thetraditional over-current trip fea-tures of today’s circuit breakerswith new supplemental arc faultdetection and protection features.shut down for motor, fan, strobelight, or �uorescent light.
The two arc fault catalog pagesrepresent the �rst generation of
arc fault circuit breakers that willbe used in the commercialaerospace market. The �rstgeneration design is based uponthe industry need to support120VAC, 400 Hz aircraftapplications.
Future design considerations forthe arc fault circuit breakersunder development by Sensatacomprehend and include:
• Arc fault trip indication• 28VDC• Operating temperature range
expansion• Single phase 30–100A• Three–phase development• Ground fault detection• Variable voltage and
frequency options
Ambient TemperatureCompensation
The arc fault series of circuitbreakers are based on the designof our existing ambient compen-sated circuit breakers productfamily permitting systemdesigners to specify smallergauge wire where the circuitbreaker and wiring are exposedto di�erent ambienttemperatures. The arc fault
circuit breakers can operate overa temperature range of-54oC to 71oC however, careshould be taken to understandthe speci�cation limits at ele-vated ambient temperatures.
Trip Free
The complete line of arc faultseries circuit breakers is tripfree. The circuit breaker cannotbe maintained closed during anoverload, even when the actuatoris held closed.
High Short Circuit Capacity
The arc fault series of circuitbreakers o�ers unusually highshort circuit current interruptingcapacity. Depending on thedevice, overloads of up to3500 amps at 120VAC, 400 Hzcan be safely interrupted.
Options
Longer push buttonsHigh vibrationRandom vibration capabilityU.S. terminals (o�set/inline)Metric mounting threads
SENSATA TECHNOLOGIES
5
TEMPoC
+25-54
+121
MIN ULTTRIP
115%115%
85%
MAX ULTTRIP
138%165%145%
TRIP TIME - SECONDS
200%4-167-352-13
500%.4-1.6.6-3.0
.25-1.0
1000%.10-.40.15-.70.06-.25
Vibration*....................... 10 G’s minimum, 50 - 500 HzMechanical Shock.......... 50 G’sAcceleration................... 10 G’sWeight............................ 42 gm max
Interrupt Current1-20 amps: 6000 amps at 28 VDC25 amps: 1625 amps at 28 VDC1-15 amps: 2500 amps at 120 VAC, 400 Hz20 amps: 2000 amps at 120 VAC, 400 Hz25 amps: 1800 amps at 120 VAC, 400 Hz
Endurance2500 cycles 120 VAC, 400 Hz Inductive5000 cycles 120 VAC, 400 Hz Resistive2500 cycles 30 VDC Inductive5000 cycles 30 VDC Resistive10,000 cycles Mechanical, no load
* Other vibration levels available. Contact factory for details.
Characteristics
Calibration: 1-25 amps
Approximate Time-Current Curves – APD Circuit Breakers1000
100
% R
ated
Cur
rent
0.01 0.1 1 10 100 1000Trip Time in Seconds
165%138%115%85%
-54oC MAXIMUM TRIP CURVE
+25oC TRIP BAND
+121oC MINIMUM TRIP CURVE
Arc Fault
1.200MAX 5 AMP RATING SHOWN
15/32ø .395
1.219 1.312
.704
NEUTRAL LEAD LENGTH& CONNECTION TBD
.2841.030 MAX
.800 MAX
Performance:Discrimination (resistance to nuisance trips)Devices manufactured by Sensata have demonstrated successon start up, bus transfer, and shut down for motor, fan,strobe light, and �uorescent light.
Detail performance per test document 76508Phase to Phase and Phase to Ground 400 Hz, 120/205VAC
Guillotine Arc Test:Guillotine Arc Current .......Less than 700% RC rms Steady State Load ..............None to rated currentMaximum Arcing Cycles ....EightArcing Time Duration .........Less than 100ms
Loose Terminal Arc DetectionSteady State Load ..............Less than 40% RC rmsTripping Time: ....................Less than 2 minutesVibration Source .................Eccentric motor vibratory table
Wet Arc DetectionMIL-STD-2223 Method 3005, wire per MIL-W-81381/11
Boeing Basic Specification
BACC18UBACC18WBACC18ZBACC18AABACC18ACBACC18ADBACC18AE10-60806-XX10-60806-XXXX
Boeing (DPD)
5D0001NoneNone
SensataStyle
7274-217276-132TC62TC146TC62TC479TC66752-3046752-311
7274-627274-557276-115
Airbus Basic Specification
NSA931303NSA931304NSA931320NSA931321NSA931322NSA931323NSA931324NSA931325E0730-005E0731-005E0732-005E0733-005
SensataStyle
6752-126752-3052TC505TC506TC5015TC502TC646TC642TC656TC655TC6515TC65
Commercial Aircraft Circuit Breaker Cross Reference
QPL approved Aircraft Circuit Breakers speci�cations have been or are in the process of being converted to SAEindustry standard. The speci�cation requirements and part marking remains as per the original military slashsheet. The only di�erence is the SAE industry designation for the military slash sheet.
Lockheed Basic Specification
LS10158
LS10159S
SensataStyle
2TC20, 3TC202TC26/3TC266TC20, 9TC206TC26/9TC26
For FAA/PMA part availability go to www.sensata.com
Cross Reference
European Norms
EN2495EN2592EN2794EN2995EN2996EN3661EN3662EN3773EN3774
AS Number
AS 33201AS 33201LAS 33201VAS 14105AS 14105LAS 14153AS 14154AS 14154L
Sensata Number
2TC22TC272TC633TC23TC279TC26TC26TC37
AS Number
AS 14154VAS 22073AS 22073VAS 26574AS 25244AS 25244(P)
Sensata Number
6TC637274-117274-697274-23TC73TC8
AS Number
AS 26574AAS 26574LAS 24509AAS 24509BAS 24510AAS 24510B
Sensata Number
7274-47274-707270-17270-77271-87271-3
Simplified Glossary of Circuit Breaker TermsCircuit breaker– A devicedesigned to carry a speci�c valueof current and automatically opena circuit upon overloads orshort circuits.
Thermal circuit breaker –A circuit breaker that senses a current overload based on thermalheating of the sensing element.
Time-current curve – An approx-imate graph showing the minimumand maximum time a speci�cbreaker will take to trip on variousdegrees of overload.
Ambient compensation –A feature of some thermal breakersthat limits or eliminates thermalderating due to ambienttemperature.
Minimum ultimate trip – Currentrating at which a breaker will nottrip within a certain period (usually1 hour) at a speci�ed temperature.
Maximum ultimate trip – Currentrating at which a breaker must tripwithin a certain period (usually 1hour) at a speci�ed temperature.Thermal derating – Tendency of abreaker to trip at lower currentlevels due to higher ambienttemperatures, and to trip at higherlevels due to lower ambienttemperatures.
Trip-free – Feature of certain breakers that makes it impossible tohold the breaker closed against anoverload.
Manual reset – Method ofaccomplishing reclosure aftercircuit interruption has occurred.
Indicating, non-indicating –Whether or not breaker givesprominent visual indication ofopening, such as exposing a whiteband around button, or movingtoggle to o� position.
Manual trip – Ability of breakerto be opened manually.
Auxiliary circuit – An integrallyhoused, electrically independentswitch linked mechanically tooperate with the main circuitbreaker contacts.
Voltage drop – The voltagedecrease across the breaker due tointernal resistance of the device.
WARRANTY
Sensata Technologies warrants its circuit breakersagainst faulty workmanship or the use ofdefective materials for a period of 18 monthsfrom date of manufacture. This warrantyapplies only to products purchased directlyfrom Sensata Technologies or through an author-ized Sensata Technologies distributor. During thewarranty period, any circuit breaker found bySensata Technologies, in its sole judgement, to bedefective, will be repaired or replaced, at theoption of Sensata Technologies. Under no circum-stances does Sensata Technologies responsibilityor liability extend to incidental or consequen-tial damages whatsoever.
The foregoing is in lieu of all warranties express, implied or statutory, including, but notlimited to, any implied warranty of merchant-ability and fitness for a purpose and of anyother warranty obligation on the part ofSensata Technologies.
Important Notice: Sensata Technologies (Sensata) reserves the right to make changes to or discontinue any product or service identified in this publication without notice. Sensata advises its customers to obtain the latest version of the relevant information to verify, before placing any orders, that the information being relied upon is current. Sensata assumes no re-sponsibility for infringement of patents or rights of others based on Sensata applications assistance or product specifications since Sensata does not possess full access concerning the use or application of customers’ products. Sensata also assumes no responsibility for customers’ product designs.
www.sensata.com
New York
California Georgia
France
Holland
United Kingdom
Israel
ItalySingapore
Authorized U.S. Distributors of All Products
Name
Peerless Electronics
Flame Enterprises
TPS Aviation
Avio DiepenWesco Aircraft
Main Office
Lynbrook, NY
Canoga Park, CA
Hayward, CAAtlanta, GAWichita, KS
Phone
(800) 285-2121(516) 593-2121(800) 854-2255(818) 700-2905(510) 475-1010(770) 996-6430(800) 544-4070
Fax
(516) 593-2179
(818) 700-9168
(510) 475-8817(770) 996-8430
Web Site
www.peerlesselectronics.com
www.flamecorp.com
www.avio-diepen.comwww.airtechnics.com
Name
JB ControlsAvio DiepenCharcroft Electronics LtdOdem ElectronicsPatton AirPrecision Technologies
Main Office
Paris, FranceHollandEnglandIsraelItalySingapore
Phone
33 1 56 47 04 0431 172 449759+44 (0) 1591 610408972 3 966 034039 331 792 6586 65 27 34 573
Fax
33 1 56 47 04 0531 172 449789
972 3 966 034539 331 796 5526 65 27 38 898
Web Site
[email protected]@[email protected]@[email protected]
Other Distributors and Sales Agents
Authorized DistributorsKansas