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| Company | IECQ Certificate Number | | Country / location | Issue date | Status |
|---|
 SAKAE TSUSHIN KOGYO CO., LTD. | IECQ-P JQAJP 13.0004 | | Japan | 2024/07/30 | Current |
| SAKAE TSUSHIN KOGYO CO., LTD. | IECQ-P JQAJP 13.0004-01 | | Japan | 2024/07/30 | Current |
| SANMENXIA INSTRUMENT ELECTRONICS CO., LTD. | IECQ-P CEP 17.0005 | | China | 2018/09/20 | Cancelled |
| SANWA ELECTRONIC CIRCUIT CO., LTD. | IECQ-P JQAJP 13.0002 | | Japan | 2024/05/24 | Current |
| Secure Components, LLC. | IECQ-P DNVUS 13.0001 | | United States of America | 2013/07/05 | Cancelled |
| SEMITEC Corporation | IECQ-P JQAJP 13.0003 | | Japan | 2013/04/01 | Cancelled |
| Shanghai Aviation Electric Co., Ltd. | IECQ-P NQAGB 20.0003 | | China | 2021/05/20 | Cancelled |
| Shenzhen K&D Technology Co., Ltd. Nanjing Branch | IECQ-P SAIG 24.0003 | | China | 2024/07/25 | Current |
| SHENZHEN MEIKAI ELECTRONICS STOCK CO., LTD. | IECQ-P CEP 13.0002 | | China | 2013/12/03 | Cancelled |
| Shenzhen Phoenix Telecom Technology Co., Ltd | IECQ-P NQAGB 22.0003 | | China | 2022/06/28 | Cancelled |
| Shenzhen Phoenix Telecom Technology Co., Ltd. | IECQ-P NQAGB 23.0003 | | China | 2024/07/24 | Current |
| Shenzhen Phoenix Telecom Technology Co., Ltd. | IECQ-P NQAGB 23.0003-01 | | China | 2024/07/24 | Current |
| Shenzhen Phoenix Telecom Technology Co., Ltd. | IECQ-P NQAGB 23.0003-02 | | China | 2024/07/24 | Current |
| Shenzhen Phoenix Telecom Technology Co., Ltd. | IECQ-P NQAGB 21.0003 | | China | 2021/04/21 | Cancelled |
| SHENZHEN YASSY TECHNOLOGY CO., LTD. | IECQ-P CEP 16.0002 | | China | 2016/08/01 | Cancelled |
| SHENZHEN YASSY TECHNOLOGY CO., LTD. | IECQ-P CEP 13.0001 | | China | 2013/05/24 | Cancelled |
| Shin Chin Industrial Co., Ltd. | IECQ-P ULTW 12.0009 | | Taiwan | 2021/03/31 | Cancelled |
| SICHUAN YONGXING ELECTRONICS CO., LTD. | IECQ-P CEP 18.0011 | | China | 2024/07/20 | Current |
| Siliconware Precision Industries Co., Ltd. | IECQ-P ULTW 12.0011 | | Taiwan | 2012/07/06 | Cancelled |
| Siliconware Precision Industries Co., Ltd. | IECQ-P ULTW 12.0010 | | Taiwan | 2012/07/06 | Cancelled |
| Siliconware Precision Industries Co., Ltd. Hsinch... | IECQ-P ULTW 12.0012 | | Taiwan | 2012/07/06 | Cancelled |
| Siliconware Precision Industries Co., Ltd. | IECQ-P ULTW 12.0013 | | Taiwan | 2012/07/06 | Cancelled |
| Siliconware Precision Industries Co., Ltd. Hsinchu... | IECQ-P ULTW 12.0015 | | Taiwan | 2012/07/06 | Cancelled |
| Siliconware Precision Industries Co., Ltd. Hsinchu... | IECQ-P ULTW 12.0014 | | Taiwan | 2012/07/06 | Cancelled |
| Sin Yu Technology Inc. | IECQ-P ULTW 12.0001 | | Taiwan | 2020/11/02 | Cancelled |
| SOURIAU Morocco | IECQ-P BSI 14.0014-01 | | Morocco | 2023/10/03 | Current |
| Souriau Sarthe | IECQ-P BSI 14.0014 | | France | 2023/10/03 | Current |
| STPI | IECQ-P LCIE 12.0007 | | France | 2021/12/28 | Cancelled |
| Suma Information Industry Co.,Ltd. | IECQ-P NQAGB 23.0009 | | China | 2023/12/28 | Current |
| Sunf Pu Technology Co., Ltd. | IECQ-P ULTW 11.0005 | | Taiwan | 2017/11/22 | Cancelled |
| SUNTRONT TECHNOLOGY CO. LTD. | IECQ-P CEP 19.0016 | | China | 2019/12/16 | Cancelled |
| Suzhou City Gusu Plating Co., Ltd | IECQ-P BSI 13.0009-04 | | China | 2014/07/10 | Cancelled |
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