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| IECQ Certificate Number | | Company | Country / location | Issue date | Status |
|---|
 IECQ-P ULTW 14.0001 | | Hold Key Electric Wire and Cable Co., Ltd. | Taiwan | 2023/10/22 | Current |
| IECQ-P ULTW 12.0017 | | I Sheng Electric Wire & Cable Co., Ltd. | Taiwan | 2013/02/22 | Cancelled |
| IECQ-P ULTW 12.0016 | | True Test Technology Inc. | Taiwan | 2013/08/01 | Cancelled |
| IECQ-P ULTW 12.0015 | | Siliconware Precision Industries Co., Ltd. Hsinchu... | Taiwan | 2012/07/06 | Cancelled |
| IECQ-P ULTW 12.0014 | | Siliconware Precision Industries Co., Ltd. Hsinchu... | Taiwan | 2012/07/06 | Cancelled |
| IECQ-P ULTW 12.0013 | | Siliconware Precision Industries Co., Ltd. | Taiwan | 2012/07/06 | Cancelled |
| IECQ-P ULTW 12.0012 | | Siliconware Precision Industries Co., Ltd. Hsinch... | Taiwan | 2012/07/06 | Cancelled |
| IECQ-P ULTW 12.0011 | | Siliconware Precision Industries Co., Ltd. | Taiwan | 2012/07/06 | Cancelled |
| IECQ-P ULTW 12.0010 | | Siliconware Precision Industries Co., Ltd. | Taiwan | 2012/07/06 | Cancelled |
| IECQ-P ULTW 12.0009 | | Shin Chin Industrial Co., Ltd. | Taiwan | 2021/03/31 | Cancelled |
| IECQ-P ULTW 12.0008 | | YFC-BonEagle Electric Co., Ltd. | Taiwan | 2024/04/09 | Current |
| IECQ-P ULTW 12.0007 | | Yeuen Young Electrical Co., Ltd. | Taiwan | 2024/03/05 | Current |
| IECQ-P ULTW 12.0005 | | Conquer Electronics Co., Ltd. | Taiwan | 2023/10/22 | Cancelled |
| IECQ-P ULTW 12.0004 | | EVERTOP WIRE CABLE CORPORATION CHUNG LI PLANT | Taiwan | 2024/02/01 | Current |
| IECQ-P ULTW 12.0003 | | Chung Kwang Electric Wire & Cable Co., Ltd. | Taiwan | 2016/01/26 | Cancelled |
| IECQ-P ULTW 12.0002 | | Nice Fountain Industrial Co., Ltd. | Taiwan | 2015/12/10 | Cancelled |
| IECQ-P ULTW 12.0001 | | Sin Yu Technology Inc. | Taiwan | 2020/11/02 | Cancelled |
| IECQ-P ULTW 11.0006 | | Tai Hong Circuit Industrial Co., Ltd. | Taiwan | 2023/10/30 | Current |
| IECQ-P ULTW 11.0005 | | Sunf Pu Technology Co., Ltd. | Taiwan | 2017/11/22 | Cancelled |
| IECQ-P ULTW 11.0003 | | Walsin Lihwa Corp. | Taiwan | 2015/06/26 | Cancelled |
| IECQ-P ULTW 11.0003-01 | | Walsin Lihwa Corp. | Taiwan | 2015/06/26 | Cancelled |
| IECQ-P ULTW 11.0002 | | AID Electronics Corporation | Taiwan | 2014/10/28 | Cancelled |
| IECQ-P ULTW 11.0001 | | Walsin Technology Corporation | Taiwan | 2019/12/02 | Cancelled |
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