Product Change Notification LFPCN#: 41289 I By: Dhatri ... · Time to Trip 36 0/1 250V,3A ,max test...
Transcript of Product Change Notification LFPCN#: 41289 I By: Dhatri ... · Time to Trip 36 0/1 250V,3A ,max test...
Product Change Notification LFPCN#: 41289 Issue Date: 1/3/18
By: Dhatri Bhatt Global Product Manager
[email protected] 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
2Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2016PROTECT | CONTROL | SENSE
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
3Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2016PROTECT | CONTROL | SENSE
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
8Confidential and Proprietary to Littelfuse. Littelfuse, Inc. © 2016PROTECT | CONTROL | SENSE
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