Product Change Notification LFPCN#: 41289 Issue Date: 1/3/18

By: Dhatri Bhatt Global Product Manager

DBhatt@littelfuse.com Type of Notification: Design Change Description of Change: T-Line TSM600 series housing design change Implementation Date: February CY18

Product Affected: Part description (Part Ordering Number)

1. TSM600-250F Series a) TSM600-250F-2 (A88766-000) b) TSM600-250F-RA-2 (A88390-000)

Additional Information: Reason for change: Current design assembly process could create burrs at the bottom of TSM600-250F devices which can cause device to be raised off surface and lead to loose solder joints. As a preventative measure, the housing design was re-evaluated. This is a minor cosmetic change that will not affect performance. Scopes of the change:

1. Part appearance will be changed due to minor cosmetic change on bottom of housing.

No Change to the following: 1. Data sheet will remain the same 2. Part description and ordering number will not change. 3. Part material will not change. 4. Part specification and performance will not change. 5. Part MOQ and packaging method will not change.

Design change evaluation data, please refer to the attached:

1. Part qualification report with new housing design.

1

TSM600-250F

Benchmarking Test Summary

of Housing Modification

Product Manager: Dhatri Bhatt

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Background

▪ Potential for burrs at the bottom of TSM600-250F

devices. This could cause device to be raised off surface

and lead to a loose solder joint or electrical connection.

▪ As a preventative measure, the housing design was re-

evaluated.

New DesignCurrent Design

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TSM600-250F SCD

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Samples Information

▪ 500pcs new housing were prepared for the evaluation

▪ 500pcs FG were built for the final evaluation, lot number:

GXBM.Key Dimensions of New Design

Test Results of Key DimensionsSpecification Instrument Testing Location Result

Left 1.370 1.383 1.408 ok

Right 1.398 1.383 1.432 ok

Left 3.04 3.03 3.01 ok

Right 2.97 2.97 3.01 ok

Left 1.809 1.834 1.800 ok

Right 1.820 1.830 1.812 ok

Testing value

1.85±0.1

3.02±0.1

1.4±0.1 Height Gauge

Callipers

Three dimensional imager

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Test Result: Burr

▪ Welding parameter:▪ Ultrasonic depth: 0.7 - 0.75mm

▪ Hold time:0.35 - 0.45s

▪ Burr Requirement: ≤ 0.05mm

▪ Test Result: No burr on all samples with new housing.

Sample size:

20pcs

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Test Result: Aging

▪ The MSL of TSM600 devices are 2A (60℃/90%RH 168h)

▪ Test Condition: 60℃/90%RH for 168 hours, then Reflow

on the test Board

▪ Sample Size: 15pcs/lot

▪ Acceptance Criteria: No bulb on the housing post aging

and reflow tests.

Reflow Profile

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Test Result: Aging (Con.)

▪ Test Result: All samples passed the test and no bulb was

found post aging and reflow

New Design

Current Design

New

Design

Current

Design

Post Aging Post Reflow

New Design

Current Design

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The Summary Report of TSM600 QC InspectionDevice Type TSM600-250F-RA-2

Part No A88390-000

Work Order 201021225

Batch No GXEM

Lot Qty 20,000

Sampling Qty 200

QTRC No SH2-QE60-0025-B

Inspection Duration Jun.17-19,2017

Accept ALL

Inspector 陈艇

Approval

Result PASS

QC Sampling Plan

Test Items SS A/R Acceptance Criteria Result

Accept

Visual 70 0/1Meets criteria board

Accept

Dimensions Dim A : 17min, 17.6max min 17.210 max 17.514

(mm) 70 0/1

Resistance 70 0/1 2.25min, 4.3 max; min 2.669

( Ω ) Delta R: 0.45 max 4.066

0.319

Post Reflow R min 2.25,max 4.8 min 2.926

max 4.541

Time to Trip 36 0/1 250V,3A ,max test time 6.0s, at 20 deg C min 0.806

Max TtT 4s max 1.151

all parts must trip within a specific time 1.129

R final /R initial less than or equal to 1.2

Cycle Life 36 0/1 250V,3A,5s ON 60s OFF, 10cycle

no evidence of burning of external surface 0.892

R final /R initial less than or equal to 1.2

600V,2.2A,1Hour

Trip Endurance 36 0/1no evidence of burning of external surface 1.329

R final /R initial less than or equal to 1.4

Max Initial Res before PC in Cycler 5.1

Power Cross 90 4/5no evidence of burning of external surface or

blowing of Bussman MDF 1.6A fuse

PS019-6/1103

Accept

Accept

Delta R Max:

Accept

Accept

Rf/Ri=

Rf/Ri=

Accept

Rf/Ri=

Accept

The Summary Report of TSM600 QC InspectionDevice Type TSM600-250F-2

Part No A88766-000

Work Order 201021891

Batch No GXBM

Lot Qty 600

Sampling Qty 200

QTRC No SH2-QE60-0025-B

Inspection Duration Jun.21-22.2017

Accept ALL

Inspector 陈艇

Approval

Result PASS

QC Sampling Plan

Test Items SS A/R Acceptance Criteria Result

Accept

Visual 140 0/1Meets criteria board

Accept

Dimensions Dim A : 17min, 17.6max min 17.239 max 17.548

(mm) 140 0/1

Resistance 140 0/1 2.25min, 5.6 max; min2.554

( Ω ) Delta R: 0.45 max3.755

0.277

Post Reflow R min 2.25,max 6.5 min2.888

max4.453

Time to Trip 72 0/1 250V,3A ,max test time 6.0s, at 20 deg C min0.771

Max TtT 4s max1.167

all parts must trip within a specific time 1.116

R final /R initial less than or equal to 1.2

Cycle Life 72 0/1 250V,3A,5s ON 60s OFF, 10cycle

no evidence of burning of external surface 0.9134

R final /R initial less than or equal to 1.2

600V,2.2A,1Hour

Trip Endurance 72 0/1no evidence of burning of external surface 1.3660

R final /R initial less than or equal to 1.4

Max Initial Res before PC in Cycler 6.8

Power Cross 180 4/5no evidence of burning of external surface or

blowing of Bussman MDF 1.6A fuse

PS019-8/1103

Rf/Ri=

Accept

Rf/Ri=

Accept

Accept

Delta R Max:

Accept

Accept

Rf/Ri=

Accept

Test Result: OQC

▪ The electrical performance were tested per QTR

with double samples size

▪ Test Result: Pass.

New Design

(GXBM) Current Design

(GXEM)

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Conclusion

▪ All samples passed.

▪ The new housing meets all design requirements.

LFPCN41289 Affected Parts ListMaterial Material Description

A88766-000 TSM600-250F-2A88390-000 TSM600-250F-RA-2