Jan. 20 th, 2017 RE: LFPCN TO: Our Valued Customers. From: Littelfuse Product Management Team. Subject: LFPCN Axial Package 2 nd

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1 Jan. 20 th, 2017 RE: LFPCN41245 TO: Our Valued Customers From: Littelfuse Product Management Team Subject: LFPCN Axial Package 2 nd Assembly Manufacturing Site Approval This is a notification of 2 nd assembly facility approval for some Littelfuse semiconductor axial-packaged products including TVS, SIDACtor and SIDAC. Please refer to attachment for affected parts number list. Qualification efforts have been completed and all affected products have been fully qualified in accordance with established performance and reliability criteria. Both assembly sites use current Wuxi in-house dies. We will start implementing this change on Apr 20 th The new facility will begin its shipments starting in May 1 st 2017, and customers can expect to start receiving products from that point moving forward. This is a rolling change and you can expect products from both assembly manufacturing sites during the implementation period. Full qualification data and/or samples will be available upon request. Form, fit, function and shape changes: Comply to JEDEC standard and datasheet Part number changes: None Effective date: Apr 20 th 2017 Replacement products: N/A Last time buy: Mar 1 st 2017 This notification is for your information and acknowledgement. If you have any other questions or concerns, please contact Meng Wang, Assistant Product Manager for Axial-Packaged TVS and SIDACtor, contact Jia Zhu for Axial-Packaged SIDAC We value your business and look forward to assisting you Best Regards, Meng Wang Jia Zhu Assistant Product Marketing Manager, Assistant Product Marketing Manager, Tel: , extension 7955 Tel: , extension 7966 Mwang3@littelfuse.com Jzhu3@littelfuse.com

2 800 E. Northwest Highway Des Plaines, IL PCN#: LFPCN41245 Date: Jan 20 th 2017 Product Identification: Product/Process Change Notice (PCN) Littelfuse semiconductor Axial-Packaged Products Title: Assistant Product Manager Implementation Date for Change: Apr 20 th 2017 Category of Change: Assembly Process Data Sheet Technology Discontinuance/Obsolescence Equipment Manufacturing Site Raw Material Testing Fabrication Process Other: Important Dates: Contact Information Name: Meng Wang Phone #: Fax#: Description of Change: Littelfuse would notify you the we now have a 2 nd manufacture facility qualified a as a Littelfuse alternative assembly,testing and packing facility for littelfuse semiconductor axial package products DO-41 and DO-201,DO-15 SIDAC and SIDACtor. There is no electrical parameter change. All relevant details comparison are included in the supplemental qualfication report page Qualification Samples Available: Jan 20 th 2017 Last Time Buy: Mar 1 st 2017 Final Qualification Data Available: Jan 20 th 2017 Date of Final Product Shipment: Method of Distinguishing Changed Product Product Mark, Date Code, refer to last page -marking Other, Demonstrated or Anticipated Impact on Form, Fit, Function or Reliability: N/A LF Qualification Plan/Results: Please refer to supplemental page Customer Acknowledgement of Receipt: Littelfuse requests you acknowledge receipt of this PCN. In your acknowledgement, you can grant approval or request additional information. Littelfuse will assume the change is acceptable if no acknowledgement is received within 30 days of this notice. Lack of any additional response within 90 days of PCN issuance further constitutes acceptance of the change.

3 Littelfuse, WX East 3# Zhen Fa 6 Road Shuo Fang Industrial Park Wuxi, Jiangsu Product Qualification Report To: Those Who May Concern From: Hellen Yang, Senior Product Engineer, Littelfuse. Date: Jan 16 th, 2016 Subject: Manufacturing location changed of DO-41 TVS/ DO-15 SIDACtor & SIDAC/ DO-201 TVS& SIDACtor packages Purpose: This report is to inform the successful qualification test results associated with DO-41 TVS/ DO-15 SIDAC & SIDACtor/ DO-201 TVS & SIDACtor product series in outsource plant. 1. Qualification Types (Test Vehicle) Product Series Representative Test Sample Part Numbers Package Assembly Location P4KE6.8A P4KE91CA DO-41 Commercial TVS P4KE510A LCE24A 1.5KE6.8A DO KE510A K2000GURP Outsource SIDAC K2200GRP DO-15 K22001GRP SIDACtor P0080GALRP P3002GBLRP DO-15 T10B080B DO-201

4 2. Qualification Test Items and Result Summary: Sample Littelfuse Product Test Category Description Sample P/N Qty test Ref# P0080GALRP Electrical Parametric P3002GBLRP Parameters T10B080B SIDACtor Surge out Reliability surge out 8/20us surge out 10/700us surge out 10/1000us DC/AC Blocking (HTRB) P0080GALRP P3002GBLRP T10B080B P0080GALRP P3002GBLRP T10B080B P0080GALRP P3002GBLRP T10B080B P0080GALRP P3002GBLRP T10B080B P0080GALRP Contents/Conditions Standard Result Summary Temp Cycle P3002GBLRP cycles, -55 C & +150 C, M-1051, Cond. F 0 failure at 1000 cycles H3TRB HTSL T10B080B P0080GALRP P3002GBLRP T10B080B P0080GALRP P3002GBLRP T10B080B P0080GALRP VBO. Vdrm, IH, VT +/- hit, from rated Ipp, 0.1Ipp step +/- hit, from rated Ipp, 0.1Ipp step +/- hit, from rated Ipp, 0.1Ipp step 125, 24h at +/-80%Vdrm, AC blocking test with AC peak 80% Vdrm 168/504/1008h 168/504/1008 hours at Tj = 85C/85% RH with device reverse biased at 80% VDRM and not exceed 52V. 168/504/1008h at 150 C M-1038, Cond. A EIA/JESD22-A101B 100% meet published spec. 100% passing at Rated IPP 100% passing at Rated IPP 100% passing at Rated IPP 0 failure at 1008h 0 failure at 1008h Autoclave P3002GBLRP TA = 121, RH =100% 48/96h EIA/JESD22-A102B Pass T10B080B Solderability P0080GALRP Both B and D test methods 0% failure after Solderability RSH P0080GALRP , 10 seconds*3 full M % failure after RSH JESD22-A103 0 failure at 1008h Sample Littelfuse Product Test Category Description Sample P/N Qty test Ref# K2000GURP Electrical K2200GRP Parameters K2201GRP SIDAC Parametric Reliability ITRM ITSM AC Blocking (HTRB) Temp Cycle H3TRB K2000GURP K2200GRP K2201GRP K2000GURP K2200GRP K2201GRP K2000GURP K2200GRP K2201GRP K2000GURP K2200GRP K2201GRP K2000GURP K2200GRP K2201GRP K2000GURP Contents/Conditions Standard Result Summary Autoclave K2200GRP TA = 121, RH =100% 48/96h EIA/JESD22-A102B Pass RSH K2201GRP K2000GURP K2201GRP VBO. Vdrm, IH, VT TA 125 C, 168hr, ITRM, 5Hz, 10usec Pulse width 50hz, Single cycle test from rated Ipp, 0.1Ipp step 125, Vpk=Vdrm 168/504/1008h 1000cycles, -55 C & +150 C, dwell time 15mins, transfer time less than 10sec H3TRB, 85 C, 85%RH, +DC at 80%VBO min, 1,008hr No preheating Bath 260 C, full submerge 10 sec x 2 time JESD22- A108 JESD22-A104 JESD22-A101 JESD22- B % meet published spec. pass 100% passing at Rated IPP 0 failure at 1008h 0 failure 0 failure at 1008h 0% failure after RSH

5 Product Commercial TVS Test Category Parametric Surge Out Description Sample P/N Sample Electrical Parameters 10X1000us Surge Out Littelfuse test Ref# P4KE91CA P4KE6.8A P4KE510A LCE24A KE510A KE6.8A P4KE91CA P4KE6.8A P4KE510A LCE24A KE510A KE6.8A KE62CA Contents/Conditions VBR, IR +/- 1 hit, from rated IPP, 0.1 IPP step Standard Result Summary 100% meet published spec. 100% passing at 1.1xRated IPP Product Commercial TVS Test Category Reliability Description Sample P/N Sample Littelfuse test Ref# P4KE91CA DC Blocking (HTRB) High Temp Storage (HTSL) Biased Temp & Humidity (H3TRB) Autoclave Temp Cycle Resistance to Solder Heat (RSH) P4KE6.8A P4KE510A LCE24A KE510A KE6.8A P4KE91CA P4KE6.8A P4KE510A LCE24A KE510A KE6.8A P4KE91CA P4KE6.8A P4KE510A LCE24A KE510A KE6.8A P4KE510A LCE24A KE510A P4KE91CA P4KE6.8A P4KE510A LCE24A KE510A KE6.8A P4KE510A LCE24A KE510A Contents/Conditions 150, VR,168/504/1008h 168/504/1008h at 175 C 168/504/1008 hours at Tj = 85C/85% RH with device reverse biased at VDRM. TA = 121, RH =100% 48/96h 1000cycles, -55 C & +150 C, dwell time 15mins, transfer time less than 10sec No preheating Bath 260 C, full submerge 10 sec x 2 time Standard JESD22- A108 JESD22- A103 JESD22- A101 EIA/JESD22- A102B JESD22- A104 JESD22- B106 Result Summary 0% failure at 1008 hours 0% failure at 1008 hours 0% failure at 1008 hours 0% failure at 96 hours 0% failure at 1000 cycles 0% failure after RSH 3. Conclusion According to the above qualification test results, Littelfuse concluded that the product series which completed by outsource passed the all Reliability Test at WTC Lab. Outsource will be ready to start mass production.

6 4. MTBF Calculation Estimate of Failure Rate, MTBF, FITS for a Given Operation Temperature (See note) SIDAC: Temp % FR/khrs MTBF (K) FITS SIDACtor: Temp % FR/khrs MTBF (K) FITS TVS: Temp % FR/khrs MTBF (K) FITS Note: The Mean-Time-Between-Failure (MTBF) in hours and the percent failure rate per 1000 hours (%FR/khr) are computed at a 60% confidence level using the chi square method and the Arrhenius derating model for various junction operating temperatures. For the calculations, a value of 1 ev was used for the activation energy.

7 There will be marking change for the products in outsource and just as below: 1. Marking 1.1 SIDAC: 1.2 SIDACtor: Will change the trace code marking from YMXXX&XXXXX to YM6XX and number 6 is the location code. 1.3 TVS: no change of date code.

8 LFPCN41245 Affected Parts List Material P4KE6.8 P4KE6.8A P4KE6.8C P4KE6.8CA P4KE6.8-B P4KE6.8A-B P4KE6.8C-B P4KE6.8CA-B P4KE7.5 P4KE7.5A P4KE7.5C P4KE7.5CA P4KE7.5-B P4KE7.5A-B P4KE7.5C-B P4KE7.5CA-B P4KE8.2 P4KE8.2A P4KE8.2C P4KE8.2CA P4KE8.2-B P4KE8.2A-B P4KE8.2C-B P4KE8.2CA-B P4KE9.1 P4KE9.1A P4KE9.1C P4KE9.1CA P4KE9.1-B P4KE9.1A-B P4KE9.1C-B P4KE9.1CA-B P4KE10 P4KE10A P4KE10C P4KE10CA P4KE10-B P4KE10A-B P4KE10C-B P4KE10CA-B P4KE11 P4KE11A P4KE11C P4KE11CA P4KE11-B P4KE11A-B P4KE11C-B P4KE11CA-B P4KE12 P4KE12A P4KE12C P4KE12CA P4KE12-B

9 P4KE12A-B P4KE12C-B P4KE12CA-B P4KE13 P4KE13A P4KE13C P4KE13CA P4KE13-B P4KE13A-B P4KE13C-B P4KE13CA-B P4KE15 P4KE15A P4KE15C P4KE15CA P4KE15-B P4KE15A-B P4KE15C-B P4KE15CA-B P4KE16 P4KE16A P4KE16C P4KE16CA P4KE16-B P4KE16A-B P4KE16C-B P4KE16CA-B P4KE18 P4KE18A P4KE18C P4KE18CA P4KE18-B P4KE18A-B P4KE18C-B P4KE18CA-B P4KE20 P4KE20A P4KE20C P4KE20CA P4KE20-B P4KE20A-B P4KE20C-B P4KE20CA-B P4KE22 P4KE22A P4KE22C P4KE22CA P4KE22-B P4KE22A-B P4KE22C-B P4KE22CA-B P4KE24 P4KE24A P4KE24C P4KE24CA

10 P4KE24-B P4KE24A-B P4KE24C-B P4KE24CA-B P4KE27 P4KE27A P4KE27C P4KE27CA P4KE27-B P4KE27A-B P4KE27C-B P4KE27CA-B P4KE30 P4KE30A P4KE30C P4KE30CA P4KE30-B P4KE30A-B P4KE30C-B P4KE30CA-B P4KE33 P4KE33A P4KE33C P4KE33CA P4KE33-B P4KE33A-B P4KE33C-B P4KE33CA-B P4KE36 P4KE36A P4KE36C P4KE36CA P4KE36-B P4KE36A-B P4KE36C-B P4KE36CA-B P4KE39 P4KE39A P4KE39C P4KE39CA P4KE39-B P4KE39A-B P4KE39C-B P4KE39CA-B P4KE43 P4KE43A P4KE43C P4KE43CA P4KE43-B P4KE43A-B P4KE43C-B P4KE43CA-B P4KE47 P4KE47A P4KE47C

11 P4KE47CA P4KE47-B P4KE47A-B P4KE47C-B P4KE47CA-B P4KE51 P4KE51A P4KE51C P4KE51CA P4KE51-B P4KE51A-B P4KE51C-B P4KE51CA-B P4KE56 P4KE56A P4KE56C P4KE56CA P4KE56-B P4KE56A-B P4KE56C-B P4KE56CA-B P4KE62 P4KE62A P4KE62C P4KE62CA P4KE62-B P4KE62A-B P4KE62C-B P4KE62CA-B P4KE68 P4KE68A P4KE68C P4KE68CA P4KE68-B P4KE68A-B P4KE68C-B P4KE68CA-B P4KE75 P4KE75A P4KE75C P4KE75CA P4KE75-B P4KE75A-B P4KE75C-B P4KE75CA-B P4KE82 P4KE82A P4KE82C P4KE82CA P4KE82-B P4KE82A-B P4KE82C-B P4KE82CA-B P4KE91 P4KE91A

12 P4KE91C P4KE91CA P4KE91-B P4KE91A-B P4KE91C-B P4KE91CA-B P4KE100 P4KE100A P4KE100C P4KE100CA P4KE100-B P4KE100A-B P4KE100C-B P4KE100CA-B P4KE110 P4KE110A P4KE110C P4KE110CA P4KE110-B P4KE110A-B P4KE110C-B P4KE110CA-B P4KE120 P4KE120A P4KE120C P4KE120CA P4KE120-B P4KE120A-B P4KE120C-B P4KE120CA-B P4KE130 P4KE130A P4KE130C P4KE130CA P4KE130-B P4KE130A-B P4KE130C-B P4KE130CA-B P4KE150 P4KE150A P4KE150C P4KE150CA P4KE150-B P4KE150A-B P4KE150C-B P4KE150CA-B P4KE160 P4KE160A P4KE160C P4KE160CA P4KE160-B P4KE160A-B P4KE160C-B P4KE160CA-B P4KE170

13 P4KE170A P4KE170C P4KE170CA P4KE170-B P4KE170A-B P4KE170C-B P4KE170CA-B P4KE180 P4KE180A P4KE180C P4KE180CA P4KE180-B P4KE180A-B P4KE180C-B P4KE180CA-B P4KE200 P4KE200A P4KE200C P4KE200CA P4KE200-B P4KE200A-B P4KE200C-B P4KE200CA-B P4KE220 P4KE220A P4KE220C P4KE220CA P4KE220-B P4KE220A-B P4KE220C-B P4KE220CA-B P4KE250 P4KE250A P4KE250C P4KE250CA P4KE250-B P4KE250A-B P4KE250C-B P4KE250CA-B P4KE300 P4KE300A P4KE300C P4KE300CA P4KE300-B P4KE300A-B P4KE300C-B P4KE300CA-B P4KE350 P4KE350A P4KE350C P4KE350CA P4KE350-B P4KE350A-B P4KE350C-B P4KE350CA-B

14 P4KE400 P4KE400A P4KE400C P4KE400CA P4KE400-B P4KE400A-B P4KE400C-B P4KE400CA-B P4KE440 P4KE440A P4KE440C P4KE440CA P4KE440-B P4KE440A-B P4KE440C-B P4KE440CA-B P4KE446 P4KE446A P4KE480 P4KE480A P4KE480C P4KE480CA P4KE480-B P4KE480A-B P4KE480C-B P4KE480CA-B P4KE510 P4KE510A P4KE510C P4KE510CA P4KE510-B P4KE510A-B P4KE510C-B P4KE510CA-B P4KE530 P4KE530A P4KE530C P4KE530CA P4KE530-B P4KE530A-B P4KE530C-B P4KE530CA-B P4KE540 P4KE540A P4KE540C P4KE540CA P4KE540-B P4KE540A-B P4KE540C-B P4KE540CA-B P4KE550 P4KE550A P4KE550C P4KE550CA P4KE550-B

15 P4KE550A-B P4KE550C-B P4KE550CA-B P4KE15A-23-TR30 P4KE20A-101 BZW04P64B-54B P4KE15A-23-RG30 P4KE9.1CA-23-TR30 P4KE9.1CA-23-RG30