| Company | IECQ Certificate Number | | Country / location | Issue date | Status | |
A | |
| AB Electronics (Suzhou) Co.,Ltd. | IECQ-P BSI 14.0012-04 | | China | 2014/07/14 | Cancelled | |
| ABB STOTZ-KONTAKT GmbH | IECQ-P VDE 19.0002 | | Germany | 2021/12/13 | Cancelled | |
| ABB STOTZ-KONTAKT GmbH | IECQ-P VDE 19.0001 | | Germany | 2018/11/26 | Cancelled | |
| Acal BFi Germany GmbH | IECQ-P BSI 14.0006-01 | | Germany | 2015/02/01 | Cancelled | |
| Acal BFi UK Limited | IECQ-P BSI 14.0009 | | United Kingdom | 2015/02/01 | Cancelled | |
| Acal BFi UK Limited | IECQ-P BSI 14.0006 | | United Kingdom | 2015/02/01 | Cancelled | |
| Acal BFi UK Limited | IECQ-P BSI 14.0006-02 | | United Kingdom | 2015/02/01 | Cancelled | |
| AID Electronics Corporation | IECQ-P ULTW 11.0002 | | Taiwan | 2014/10/28 | Cancelled | |
| Ameya Holding Limited (Anhui Lujiang Warehouse) | IECQ-P NQAGB 21.0004 | | China | 2024/05/10 | Current | |
| Amphenol Invotec Limited | IECQ-P BSI 14.0008 | | United Kingdom | 2015/07/14 | Cancelled | |
| Amphenol Invotec Limited | IECQ-P BSI 14.0005 | | United Kingdom | 2015/07/14 | Cancelled | |
| Anglia Components Limited, T/A Anglia | IECQ-P BSI 14.0003 | | United Kingdom | 2018/10/01 | Cancelled | |
| APAT Optoelectronics Components Co. Ltd. | IECQ-P NQAGB 18.0001 | | China | 2020/01/20 | Cancelled | |
| APC Technology Group plc t/a Advanced Power Compon... | IECQ-P BSI 11.0003 | | United Kingdom | 2017/11/27 | Cancelled | |
| APEM | IECQ-P LCIE 13.0005 | | France | 2023/02/04 | Current | |
| Apem Components Limited | IECQ-P BSI 13.0001 | | United Kingdom | 2022/05/17 | Current | |
| Arrow Electronical Central Europe GmbH | IECQ-P BSI 13.0007-05 | | Germany | 2022/10/11 | Current | |
| Arrow Electronics (UK) Limited | IECQ-P BSI 13.0007 | | United Kingdom | 2022/10/11 | Current | |
| Arrow Electronics (UK) Limited | IECQ-P BSI 13.0007-02 | | United Kingdom | 2019/10/08 | Cancelled | |
| Arrow Electronics (UK) Limited | IECQ-P BSI 13.0007-03 | | United Kingdom | 2019/10/08 | Cancelled | |
| Arrow Electronics (UK) Limited | IECQ-P BSI 13.0007-04 | | United Kingdom | 2016/10/31 | Cancelled | |
| Asahi Corporation | IECQ-P JQAJP 24.0002 | | Japan | 2024/10/28 | Current | |
| Asuwa Murata Manufacturing Co., Ltd. | IECQ-P JQAJP 13.0001 | | Japan | 2013/11/25 | Cancelled | |
| Avio Excelente S.De R.L. DE C.V. | IECQ-P BSI 15.0006-02 | | Mexico | 2015/09/01 | Cancelled | |
| AVX Corporation, AVX Industries Pte Limited | IECQ-P BSI 15.0006-03 | | El Salvador | 2015/09/01 | Cancelled | |
B | |
| BADER GmbH & Co. KG | IECQ-P VDE 12.0002 | | Germany | 2024/08/29 | Current | |
| BV Arrow Electronics DLC | IECQ-P BSI 21.0001 | | Netherlands | 2024/10/22 | Current | |
| B.V. Arrow Electronics DLC | IECQ-P BSI 13.0007-01 | | Netherlands | 2019/10/08 | Cancelled | |
C | |
| CEL | IECQ-P LCIE 14.0001 | | France | 2015/03/30 | Cancelled | |
| Changzhou Tongbao Photoelectricity Co., Ltd. | IECQ-P NQAGB 19.0001 | | China | 2020/08/24 | Cancelled | |
| CHAOZHOU THREE-CIRCLE (GROUP) CO., LTD. | IECQ-P CEP 21.0019 | | China | 2024/08/30 | Current | |
| Charcroft Electronics Ltd | IECQ-P BSI 14.0001 | | United Kingdom | 2021/01/04 | Cancelled | |
| Charcroft Electronics Ltd | IECQ-P BSI 13.0010 | | United Kingdom | 2023/01/30 | Current | |
| CHENGDU TIEDA ELECTRONICS CORPORATION | IECQ-P CEP 18.0001 | | China | 2024/07/20 | Current | |
| CHENGDU XUGUANG ELECTRONICS CO., LTD. | IECQ-P CEP 18.0003 | | China | 2024/07/20 | Current | |
| CHINA ZHENHUA (GROUP) XINYUN ELECTRONIC COMP. & DE... | IECQ-P CEP 18.0006 | | China | 2024/07/20 | Current | |
| CHINA ZHENHUA (GROUP) XINYUN ELECTRONIC COMP. & DE... | IECQ-P CEP 18.0006-01 | | China | 2017/06/13 | Cancelled | |
| CHINA ZHENHUA (GROUP) XINYUN ELECTRONIC COMP. & DE... | IECQ-P CEP 18.0006-02 | | China | 2018/05/10 | Cancelled | |
| CHONGQING LIHUA TECHNOLOGY CO., LTD. | IECQ-P CEP 17.0004 | | China | 2019/11/18 | Cancelled | |
| Chongqing Rebo Lighting & Electronics Co., Ltd. | IECQ-P NQAGB 22.0002 | | China | 2023/04/12 | Cancelled | |
| Chongqing Ruibo Optoelectronics Co., Ltd. | IECQ-P NQAGB 24.0002 | | China | 2024/05/27 | Current | |
| Chung Kwang Electric Wire & Cable Co., Ltd. | IECQ-P ULTW 12.0003 | | Taiwan | 2016/01/26 | Cancelled | |
| Conquer Electronics Co., Ltd. | IECQ-P ULTW 12.0005 | | Taiwan | 2023/10/22 | Cancelled | |
D | |
| DELTA ELECTRONICS POWER (DONGGUAN) CO., LTD. | IECQ-P CEP 18.0008 | | China | 2018/08/15 | Cancelled | |
| DELTA ELECTRONICS (DONGGUAN) CO., LTD. | IECQ-P CEP 18.0010 | | China | 2019/08/13 | Cancelled | |
| DELTA NETWORKS (DONGGUAN), LTD. | IECQ-P CEP 18.0009 | | China | 2018/09/14 | Cancelled | |
| Distributed Micro Technology Ltd | IECQ-P BSI 13.0003 | | United Kingdom | 2022/06/08 | Current | |
| Dongguan Littelfuse Electronics Co Ltd | IECQ-P BSI 15.0007 | | China | 2024/09/27 | Current | |
| DONGGUAN MINGJIN ELECTRONIC TECHNOLOGY CO. LTD. | IECQ-P CEP 18.0013-01 | | China | 2018/12/27 | Cancelled | |
| DONGGUAN SINTAVE COMMUNICATION EQUIPMENT CO., LTD. | IECQ-P CEP 18.0013 | | China | 2018/12/27 | Cancelled | |
| DONGGUAN WIN SHINE ELECTRONIC CO., LTD. | IECQ-P CEP 18.0005 | | China | 2024/07/20 | Current | |
E | |
| EIGHT KOGYO CO., LTD. 1ST FACTORY | IECQ-P JQAJP 13.0005 | | Japan | 2013/04/01 | Cancelled | |
| EIGHT KOGYO CO., LTD. 2ND FACTORY | IECQ-P JQAJP 13.0005-01 | | Japan | 2013/04/01 | Cancelled | |
| Electronic Enamels & Glasses Pvt Ltd | IECQ-P BSI 21.0002 | | India | 2021/12/23 | Current | |
| EPCOS s.r.o. | IECQ-P OVE 18.0001-03 | | Czech Republic | 2017/03/02 | Cancelled | |
| EVERTOP WIRE CABLE CORPORATION CHUNG LI PLANT | IECQ-P ULTW 12.0004 | | Taiwan | 2024/02/01 | Current | |
| Express Circuits Limited | IECQ-P BSI 14.0016 | | United Kingdom | 2023/11/21 | Current | |
| EXXELIA | IECQ-P LCIE 12.0010 | | France | 2021/12/15 | Current | |
| EXXELIA | IECQ-P LCIE 12.0009 | | France | 2021/12/15 | Current | |
| EXXELIA SAS | IECQ-P LCIE 12.0005 | | France | 2024/06/27 | Current | |
F | |
| F C Lane Electronics Ltd | IECQ-P BSI 15.0004 | | United Kingdom | 2024/01/31 | Current | |
| F C Lane Electronics Ltd | IECQ-P BSI 15.0003 | | United Kingdom | 2024/01/31 | Current | |
| F C Lane Electronics Ltd | IECQ-P BSI 15.0002 | | United Kingdom | 2024/01/31 | Current | |
| Finisar Wuxi, Inc. | IECQ-P NQAGB 20.0001 | | China | 2023/02/01 | Cancelled | |
| Finisar Wuxi, Inc. | IECQ-P NQAGB 16.0001 | | China | 2016/02/22 | Cancelled | |
| Finisar Wuxi, Inc. | IECQ-P NQAGB 14.0001 | | China | 2014/10/13 | Cancelled | |
| Flextronics Computing (Suzhou) Co., Ltd. (PCBA Div... | IECQ-P NQAGB 23.0001 | | China | 2024/03/18 | Current | |
| Foshan shunde Midea Washing Appliances Mfg. Co., L... | IECQ-P DEKRA 22.0001 | | China | 2022/04/07 | Cancelled | |
| FOSHAN SHUNDE NEWTECH ELECTRONIC CO., LTD | IECQ-P CEP 18.0004 | | China | 2024/07/20 | Current | |
G | |
| Goertek Inc. | IECQ-P NQAGB 18.0004 | | China | 2023/12/21 | Current | |
| Goertek Inc. | IECQ-P NQAGB 18.0004-01 | | China | 2022/12/09 | Cancelled | |
| Goertek Inc. | IECQ-P NQAGB 18.0004-02 | | China | 2023/12/20 | Current | |
| Goertek Inc. | IECQ-P NQAGB 18.0004-03 | | China | 2022/12/09 | Cancelled | |
| GOERTEK MICROELECTRONICS INC. | IECQ-P NQAGB 20.0004 | | China | 2023/12/13 | Current | |
| GOERTEK MICROELECTRONICS VIETNAM COMPANY LIMITED | IECQ-P NQAGB 24.0003 | | Vietnam | 2024/11/12 | Current | |
| Goertek Optical Technology Co., Ltd. | IECQ-P NQAGB 23.0008 | | China | 2023/12/20 | Current | |
| Graphic Plc | IECQ-P BSI 15.0009 | | United Kingdom | 2018/11/09 | Cancelled | |
| GSPK Circuits Limited | IECQ-P BSI 14.0004 | | United Kingdom | 2015/12/16 | Cancelled | |
| GSPK Circuits Limited | IECQ-P BSI 14.0004-01 | | United Kingdom | 2015/05/01 | Cancelled | |
| GUANGDONG RUIGU OPTICAL NETWORK COMMUNICATION CO.,... | IECQ-P CEP 18.0012 | | China | 2018/11/28 | Cancelled | |
| GUIZHOU AEROSPACE ELECTRONICS ST CO., LTD. | IECQ-P CEP 16.0004 | | China | 2019/01/24 | Cancelled | |
| Gusu Electronics (Suzhou) Co., Ltd. | IECQ-P BSI 13.0009-03 | | China | 2023/03/15 | Current | |
H | |
| Hans Brockstedt GmbH | IECQ-P VDE 18.0008 | | Germany | 2015/10/20 | Cancelled | |
| Harwin Plc | IECQ-P BSI 14.0017 | | United Kingdom | 2017/10/05 | Cancelled | |
| He Yuan ZhongGuangDian Communication Technology Co... | IECQ-P NQAGB 18.0002 | | China | 2018/04/04 | Cancelled | |
| Hefei Lianchuang Optics Co., Ltd. | IECQ-P SGSCN 24.0001 | | China | 2024/11/18 | Current | |
| Hemstedt GmbH | IECQ-P VDE 18.0007 | | Germany | 2012/03/28 | Cancelled | |
| HENGDIAN GROUP DMEGC MAGNETICS CO., LTD. | IECQ-P CEP 18.0002 | | China | 2018/03/12 | Cancelled | |
| Hold Key Electric Wire and Cable Co., Ltd. | IECQ-P ULTW 14.0001 | | Taiwan | 2023/10/22 | Current | |
I | |
| I Sheng Electric Wire & Cable Co., Ltd. | IECQ-P ULTW 12.0017 | | Taiwan | 2013/02/22 | Cancelled | |
| IMS Chips - Institut für Mikroelektronik | IECQ-P VDE 18.0009 | | Germany | 2018/05/07 | Cancelled | |
| Inventec (Pudong) Technology Corporation (Sixth Fa... | IECQ-P NQAGB 21.0001 | | China | 2024/01/08 | Current | |
| Isabellenhütte Heusler GmbH & Co. KG | IECQ-P VDE 13.0004 | | Germany | 2012/03/26 | Cancelled | |
| Isabellenhütte Heusler GmbH & Co. KG | IECQ-P VDE 13.0003 | | Germany | 2014/03/14 | Cancelled | |
| Isabellenhütte Heusler GmbH & Co. KG | IECQ-P VDE 13.0003 | | Germany | 2013/03/26 | Cancelled | |
| Isabellenhütte Heusler GmbH & Co. KG | IECQ-P VDE 12.0001 | | Germany | 2011/06/21 | Cancelled | |
| ISOCOM Limited | IECQ-P BSI 13.0002 | | United Kingdom | 2017/11/02 | Cancelled | |
| IVTech Jiangsu Co., Ltd. | IECQ-P NQAGB 24.0001 | | China | 2024/02/28 | Current | |
J | |
| JAE Fuji, Ltd. Akishima Factory | IECQ-P JQAJP 13.0008-01 | | Japan | 2014/02/20 | Cancelled | |
| JAE Fuji, Ltd. Uenohara Factory | IECQ-P JQAJP 13.0008 | | Japan | 2014/02/20 | Cancelled | |
| Jiangsu Xinan Integrated Circuit Design Co., Ltd. | IECQ-P SAIG 24.0002 | | China | 2024/07/15 | Current | |
| Jinan Richens Electronic Co., Ltd. | IECQ-P NQAGB 23.0005 | | China | 2024/11/05 | Current | |
| Joint Stock Company "Ruspolymet" | IECQ-P CRR 24.0001 | | Russian Federation | 2023/11/16 | Current | |
| Joint Stock Company "Ruspolymet" | IECQ-P CRR 24.0001-01 | | Russian Federation | 2023/11/16 | Current | |
| Joint Stock Company «TITAN2 IC İÇTAŞ İNŞAAT ANONİM... | IECQ-P CRR 23.0001-01 | | Russian Federation | 2023/08/24 | Current | |
| Joyson Safety Systems Electronics (Shanghai) Co., ... | IECQ-P NQAGB 21.0007 | | China | 2021/12/08 | Cancelled | |
K | |
| Keboda Technology Corp. | IECQ-P NQAGB 13.0001 | | China | 2014/12/24 | Cancelled | |
| KEBODA TECHNOLOGY CO., LTD. | IECQ-P NQAGB 19.0003 | | China | 2023/12/28 | Current | |
| KEBODA TECHNOLOGY CO., LTD. | IECQ-P NQAGB 16.0003 | | China | 2018/06/04 | Cancelled | |
| Knowles Distribution Sdn Bhd | IECQ-P BSI 13.0009-02 | | Malaysia | 2023/09/15 | Current | |
| Knowles Electronics (Suzhou) Co., Ltd | IECQ-P BSI 13.0009-01 | | China | 2023/03/15 | Current | |
| Knowles (UK) Ltd | IECQ-P BSI 13.0009 | | United Kingdom | 2023/03/15 | Current | |
| KUNIMI MEDIA DEVICE CO., LTD | IECQ-P JQAJP 13.0009 | | Japan | 2022/01/19 | Current | |
| KYOCERA AVX Components Limited | IECQ-P BSI 15.0006 | | United Kingdom | 2024/08/28 | Current | |
| KYOCERA AVX Components Pte, Ltd. | IECQ-P BSI 15.0005 | | El Salvador | 2022/02/17 | Cancelled | |
| KYOCERA AVX Components s.r.o | IECQ-P BSI 15.0006-01 | | Czech Republic | 2024/08/28 | Current | |
| KYOCERA AVX Components s.r.o. | IECQ-P BSI 13.0004 | | Czech Republic | 2022/09/20 | Current | |
| KYOCERA AVX Components (Saint-Apollinaire) S.A.S | IECQ-P LCIE 13.0004 | | France | 2023/02/27 | Current | |
L | |
| LANGFANG CHAOWEITONG COMMUNICATION TECHNOLOGY CO.,... | IECQ-P CEP 16.0003 | | China | 2017/11/20 | Cancelled | |
| LEACH INTERNATIONAL EUROPE S.A. | IECQ-P LCIE 14.0002 | | France | 2023/10/01 | Current | |
M | |
| Martec Limited | IECQ-P BSI 14.0007 | | United Kingdom | 2017/02/27 | Cancelled | |
| MELECS Electronics Manufacturing (Wuxi) Co., Ltd. | IECQ-P NQAGB 20.0002 | | China | 2020/04/29 | Cancelled | |
| Merlin Flex Ltd | IECQ-P BSI 13.0006 | | United Kingdom | 2016/11/24 | Cancelled | |
| Micross Components Ltd | IECQ-P BSI 22.0001 | | United Kingdom | 2023/06/09 | Cancelled | |
| MIZUSAWA SEMICONDUCTOR CO., LTD | IECQ-P JQAJP 13.0006 | | Japan | 2018/12/11 | Cancelled | |
N | |
| NAGASAKI CANON INC. | IECQ-P JQAJP 19.0001 | | Japan | 2019/12/23 | Cancelled | |
| Neo-Shiny Industrial Corporation | IECQ-P NSAIUS 11.0001 | | Taiwan | 2014/04/08 | Cancelled | |
| Nice Fountain Industrial Co., Ltd. | IECQ-P ULTW 12.0002 | | Taiwan | 2015/12/10 | Cancelled | |
P | |
| P W Circuits Limited | IECQ-P BSI 15.0001 | | United Kingdom | 2024/01/31 | Current | |
| Precision Electronic Components MFG Co. | IECQ-P BSI 20.0003 | | India | 2024/10/29 | Current | |
| Precision Electronic Components MFG Co. | IECQ-P BSI 14.0012-03 | | India | 2020/06/26 | Cancelled | |
| PT TDK ELECTRONICS INDONESIA | IECQ-P OVE 18.0001-01 | | Indonesia | 2022/05/31 | Current | |
Q | |
| Qingdao Haier Special Refrigerator Co., Ltd. | IECQ-P DEKRA 21.0001 | | China | 2021/12/15 | Cancelled | |
| QINGDAO SANYUAN-MOTOTECH ELECTRONICS CO., LTD. | IECQ-P CEP 16.0001 | | China | 2018/04/25 | Cancelled | |
| QINGDAO WOERXIN ELECTRONIC TECHNOLOGY CO., LTD. | IECQ-P CEP 19.0003 | | China | 2019/02/19 | Cancelled | |
R | |
| Rongcheng Goertek Microelectronics Co., Ltd. | IECQ-P NQAGB 21.0002 | | China | 2023/12/04 | Current | |
| Rongcheng Goertek Technology Co., Ltd. | IECQ-P NQAGB 23.0007 | | China | 2023/12/20 | Current | |
| Rongcheng Goertek Technology Co., Ltd. | IECQ-P NQAGB 18.0004-05 | | China | 2022/12/09 | Cancelled | |
| RPE «RADICO» Ltd. | IECQ-P CRR 22.0001 | | Russian Federation | 2022/01/27 | Cancelled | |
| RPE «RADICO» Ltd. | IECQ-P CRR 22.0001-01 | | Russian Federation | 2022/01/27 | Cancelled | |
| RPE «RADICO» Ltd. | IECQ-P CRR 22.0001-02 | | Russian Federation | 2022/01/27 | Cancelled | |
| Rutronik Elektronische Bauelemente GmbH | IECQ-P VDE 16.0001 | | Germany | 2022/06/30 | Current | |
| Rutronik Elektronische Bauelemente GmbH | IECQ-P VDE 16.0001-01 | | Germany | 2022/06/30 | Current | |
| Rutronik Elektronische Bauelemente GmbH | IECQ-P VDE 16.0001-02 | | Germany | 2022/06/30 | Current | |
S | |
| 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 CHANGHONG PRECISION ELECTRONIC TECHNOLOGY ... | IECQ-P CEP 19.0012 | | China | 2024/07/20 | Current | |
| 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 | |
T | |
| Tai Hong Circuit Industrial Co., Ltd. | IECQ-P ULTW 11.0006 | | Taiwan | 2023/10/30 | Current | |
| TDK CROATIA d.o.o. | IECQ-P OVE 18.0001-04 | | Croatia | 2022/05/31 | Current | |
| TDK Electronics GmbH & Co OG | IECQ-P OVE 18.0001 | | Austria | 2022/05/31 | Current | |
| TDK (Zhuhai FTZ) Co., Ltd. | IECQ-P OVE 18.0001-02 | | China | 2022/05/31 | Current | |
| TITAN2 IC İÇTAŞ İNŞAAT ANONİM ŞİRKETİ | IECQ-P CRR 23.0001 | | Turkey | 2023/08/24 | Current | |
| True Test Technology Inc. | IECQ-P ULTW 12.0016 | | Taiwan | 2013/08/01 | Cancelled | |
| TT Electronics Limited | IECQ-P BSI 20.0001 | | Barbados | 2020/11/03 | Cancelled | |
| TT Electronics Limited | IECQ-P BSI 14.0012-01 | | Barbados | 2020/06/26 | Cancelled | |
| TTI Inc | IECQ-P BSI 14.0013 | | Germany | 2023/05/26 | Current | |
| TTI Inc | IECQ-P BSI 14.0013-01 | | United Kingdom | 2017/08/10 | Cancelled | |
| TTI Inc | IECQ-P BSI 14.0013-02 | | United Kingdom | 2022/10/26 | Cancelled | |
| TTI Inc | IECQ-P BSI 14.0013-03 | | United Kingdom | 2023/05/26 | Current | |
U | |
| Ultra Electronics Ltd | IECQ-P BSI 14.0018 | | United Kingdom | 2020/11/05 | Cancelled | |
| UniOhm Electronics Industry Co. Ltd | IECQ-P BSI 14.0012-02 | | China | 2020/06/26 | Cancelled | |
| Uniroyal Electronics Industry Co., Ltd | IECQ-P BSI 20.0002 | | China | 2024/01/04 | Current | |
V | |
| Vishay Advanced Technologies Ltd. - Foil Resistors | IECQ-P LCIE 13.0002 | | Israel | 2022/09/16 | Current | |
| VISHAY BCcomponents Beyschlag GmbH | IECQ-P VDE 18.0011 | | Germany | 2024/04/04 | Current | |
| VISHAY BCcomponents Beyschlag GmbH | IECQ-P VDE 18.0011-01 | | Czech Republic | 2024/04/04 | Current | |
| VISHAY BCcomponents Beyschlag GmbH | IECQ-P VDE 18.0011-02 | | China | 2024/04/04 | Current | |
| VISHAY BCcomponents Beyschlag GmbH | IECQ-P VDE 18.0011-03 | | China | 2024/04/04 | Current | |
| VISHAY BCcomponents Beyschlag GmbH | IECQ-P VDE 18.0010 | | Czech Republic | 2023/03/10 | Cancelled | |
| VISHAY BCcomponents Beyschlag GmbH | IECQ-P VDE 18.0003 | | Israel | 2023/04/11 | Current | |
| VISHAY BCcomponents Beyschlag GmbH | IECQ-P VDE 18.0002 | | Israel | 2023/04/11 | Current | |
| VISHAY ELECTRONIC GmbH | IECQ-P VDE 18.0005 | | Germany | 2022/11/26 | Current | |
| VISHAY ELECTRONIC GmbH | IECQ-P VDE 18.0005-01 | | Czech Republic | 2022/11/26 | Current | |
| VISHAY ELECTRONIC GmbH | IECQ-P VDE 18.0004 | | Germany | 2022/11/26 | Current | |
| VISHAY ELECTRONIC GmbH | IECQ-P VDE 18.0004-01 | | Germany | 2022/11/26 | Current | |
| VISHAY ELECTRONIC GmbH | IECQ-P VDE 18.0004-02 | | Czech Republic | 2022/11/26 | Current | |
| Vishay Electronic GmbH, Draloric Beyschlag Divisio... | IECQ-P VDE 13.0002 | | Czech Republic | 2012/12/07 | Cancelled | |
| VISHAY ELECTRONIC GmbH; Draloric Beyschlag Divisio... | IECQ-P VDE 18.0001 | | Germany | 2023/11/23 | Current | |
| VISHAY Electronic Spol.s.r.o., Zavod Dolny Rychnov... | IECQ-P VDE 18.0001-01 | | Czech Republic | 2023/11/23 | Current | |
| VISHAY ELECTRONICS Spol s.r.o. | IECQ-P LCIE 12.0003 | | Czech Republic | 2018/03/27 | Cancelled | |
| Vishay Electrónica Portugal Lda, | IECQ-P VDE 13.0001 | | Portugal | 2021/10/26 | Current | |
| VISHAY ISRAEL Ltd. | IECQ-P LCIE 13.0001 | | Israel | 2022/09/16 | Current | |
| VISHAY Israel Ltd. | IECQ-P VDE 18.0006 | | Israel | 2022/03/22 | Cancelled | |
| VISHAY Israel Ltd. | IECQ-P VDE 18.0006-01 | | Israel | 2022/03/22 | Cancelled | |
| VISHAY S.A. Division SFERNICE | IECQ-P LCIE 12.0001 | | France | 2018/03/28 | Cancelled | |
| VISHAY TANSITOR ELECTRONICS, Inc. | IECQ-P LCIE 12.0008 | | United States of America | 2018/09/14 | Cancelled | |
W | |
| Wakura Murata Mfg. Co., Ltd. | IECQ-P JQAJP 18.0001 | | Japan | 2018/05/01 | Cancelled | |
| Walsin Lihwa Corp. | IECQ-P ULTW 11.0003 | | Taiwan | 2015/06/26 | Cancelled | |
| Walsin Lihwa Corp. | IECQ-P ULTW 11.0003-01 | | Taiwan | 2015/06/26 | Cancelled | |
| Walsin Technology Corporation | IECQ-P ULTW 11.0001 | | Taiwan | 2019/12/02 | Cancelled | |
| Weifang Goertek Electronics Co., Ltd. | IECQ-P NQAGB 18.0004-04 | | China | 2023/12/20 | Current | |
| Weifang Goertek Electronics Co., Ltd. | IECQ-P NQAGB 18.0004-06 | | China | 2023/12/20 | Current | |
| Weifang Goertek Microelectronics Co., Ltd. | IECQ-P NQAGB 20.0005 | | China | 2023/11/29 | Current | |
| Weifang Jingwei High-Tech Electronic Technology Co... | IECQ-P NQAGB 21.0005 | | China | 2024/05/21 | Current | |
| WEIHAI DONGXING ELECTRONICS CO., LTD. | IECQ-P CEP 17.0006 | | China | 2017/11/06 | Cancelled | |
| Welwyn Components Ltd. | IECQ-P BSI 14.0012 | | United Kingdom | 2023/07/13 | Current | |
| WHST Co., Ltd. | IECQ-P NQAGB 23.0004 | | China | 2024/08/15 | Current | |
X | |
| XI 'AN MODERN CONTROL TECHNOLOGY RESEARCH INSTITUT... | IECQ-P CEP 19.0002 | | China | 2019/01/23 | Cancelled | |
Y | |
| YAMASHITA MATERIALS CORPORATION | IECQ-P JQAJP 13.0007 | | Japan | 2024/05/10 | Current | |
| Yealy Optic Electronic Co., Ltd. | IECQ-P NSAIUS 11.0003 | | Taiwan | 2013/01/19 | Cancelled | |
| Yeuen Young Electrical Co., Ltd. | IECQ-P ULTW 12.0007 | | Taiwan | 2024/03/05 | Current | |
| YFC-BonEagle Electric Co., Ltd. | IECQ-P ULTW 12.0008 | | Taiwan | 2024/04/09 | Current | |
Z | |
| Zhejiang EV-Tech Co., Ltd. | IECQ-P NQAGB 22.0001 | | China | 2023/12/13 | Current | |
| Zhejiang Keboda Industry Corp. | IECQ-P NQAGB 23.0006 | | China | 2023/12/13 | Current | |
| Zhejiang Keboda Industry Corp. | IECQ-P NQAGB 21.0006 | | China | 2022/09/29 | Cancelled | |
| Zhejiang Keboda Industry Corp. | IECQ-P NQAGB 19.0004 | | China | 2019/12/03 | Cancelled | |
| Zhejiang Keboda Industry Corp. | IECQ-P NQAGB 18.0003 | | China | 2018/05/21 | Cancelled | |
| Zhejiang Keboda Industry Corp. | IECQ-P NQAGB 17.0001 | | China | 2018/05/21 | Cancelled | |
| Zhejiang Keboda Industry Corp. | IECQ-P NQAGB 16.0002 | | China | 2016/02/18 | Cancelled | |
| Zhejiang Mingzhen Electric & Electronic Co., Ltd. | IECQ-P NQAGB 23.0002 | | China | 2024/08/15 | Current | |
| Zhejiang Mingzhen Electric & Electronic Co., Ltd. | IECQ-P NQAGB 19.0002 | | China | 2021/09/08 | Cancelled | |
| Zhuhai Gotech Intelligent Technology Co., Ltd. | IECQ-P SAIG 24.0001 | | China | 2024/02/05 | Current | |
| ZOT Engineering Ltd | IECQ-P BSI 14.0015 | | United Kingdom | 2017/10/18 | Cancelled | |