| Manufacturer | CB Certificate No. | IECQ Certificate No. | | CB/NAI | Issue Date | Status | |
|---|
![Hide details for WAFER WORKS CORP (Semiconductor Material... [Taiwan]](/iecq/iecqweb.nsf/newTwistie.gif?OpenImageResource&ImgIndex=1) WAFER WORKS CORP (Semiconductor Material... [Taiwan] |  |
| 20006234 ITL | IECQ-L ULTW 22.0004 | | ULTW (TAIWAN ) | 2022/02/24 | Current | |
| Wafer Works Corporation [Taiwan] | |
| T1070 | M-IECQ ECB 04.0070 | | ECB (United States of America) | 2000/02/15 | Cancelled | |
| Walsin Lihwa Corp [Taiwan] | |
| T1071-3 | M-IECQ ECB 04.0073 | | ULTW (United States of America) | 1996/06/10 | Cancelled | |
| Walsin Technology Corporation [Taiwan] | |
| T1072-3 | M-IECQ ECCB 07.0003 | | ULTW (United States of America) | 2007/05/08 | Cancelled | |
| T1072-1 | M-IECQ ECB 04.0074 | | ULTW (United States of America) | 1996/04/24 | Cancelled | |
| Weald Electronics Limited [United Kingdom] | |
| M1000 IECQ | M-IECQ BSI 04.0001 | | BSI (United Kingdom) | 2011/06/03 | Cancelled | |
| E1200/F | Q-IECQ BSI 05.0002 | | BSI (United Kingdom) | 2010/10/13 | Cancelled | |
| E1180/F | Q-IECQ BSI 05.0001 | | BSI (United Kingdom) | 2004/10/13 | Cancelled | |
| Wearness Electronics Zhongshan Ltd [China] | |
| HA128911 | Q-IECQ VDE 05.0022 | | VDE (Germany) | 2000/05/17 | Cancelled | |
| Well Fortune Technical Co, Ltd [Taiwan] | |
| T1073 | M-IECQ ECB 04.0076 | | ULTW (United States of America) | 1999/08/23 | Cancelled | |
| Welwyn Components Limited [United Kingdom] | |
| E1269/F | Q-IECQ BSI 05.0009 | | BSI (United Kingdom) | 2004/01/07 | Cancelled | |
| E1266/F | Q-IECQ BSI 05.0005 | | BSI (United Kingdom) | 2004/01/07 | Cancelled | |
| E1178/F | Q-IECQ BSI 05.0003 | | BSI (United Kingdom) | 2005/01/18 | Cancelled | |
| E1069/F | Q-IECQ BSI 05.0024 | | BSI (United Kingdom) | 2004/01/07 | Cancelled | |
| E1063/F | Q-IECQ BSI 05.0022 | | BSI (United Kingdom) | 2004/01/07 | Cancelled | |
| E1059/F | Q-IECQ BSI 05.0023 | | BSI (United Kingdom) | 2004/01/07 | Cancelled | |
| E1054/F | Q-IECQ BSI 05.0021 | | BSI (United Kingdom) | 2004/01/07 | Cancelled | |
| E1053/F | Q-IECQ BSI 05.0020 | | BSI (United Kingdom) | 2004/01/07 | Cancelled | |
| E1046/F | Q-IECQ BSI 05.0069 | | BSI (United Kingdom) | 2004/01/07 | Cancelled | |
| E0988/F | Q-IECQ BSI 05.0025 | | BSI (United Kingdom) | 2004/01/07 | Cancelled | |
| E0972/F | Q-IECQ BSI 05.0050 | | BSI (United Kingdom) | 2004/01/07 | Cancelled | |
| E0961/F | Q-IECQ BSI 05.0049 | | BSI (United Kingdom) | 2004/01/07 | Cancelled | |
| E0470/N | Q-IECQ BSI 05.0039 | | BSI (United Kingdom) | 2004/01/07 | Cancelled | |
| E0245/N | Q-IECQ BSI 05.0047 | | BSI (United Kingdom) | 2004/01/07 | Cancelled | |
| E0243/N | Q-IECQ BSI 05.0042 | | BSI (United Kingdom) | 2004/01/07 | Cancelled | |
| E0243/N | Q-IECQ BSI 05.0042 | | BSI (United Kingdom) | 2004/01/07 | Cancelled | |
| E0241/N | Q-IECQ BSI 05.0044 | | BSI (United Kingdom) | 2004/01/07 | Cancelled | |
| E0240/N | Q-IECQ BSI 05.0045 | | BSI (United Kingdom) | 2004/01/07 | Cancelled | |
| E0235/N | Q-IECQ BSI 05.0046 | | BSI (United Kingdom) | 2004/01/07 | Cancelled | |
| E0146/F | Q-IECQ BSI 05.0051 | | BSI (United Kingdom) | 2004/01/07 | Cancelled | |
| E0085/F | Q-IECQ BSI 05.0019 | | BSI (United Kingdom) | 2004/01/07 | Cancelled | |
| WENZHOU LUCHENG ZHENGTAI RESISTOR CO, LT... [China] | |
| 0231/M | M-IECQ CEP 06.0013 | | CEP (China) | 2003/12/05 | Cancelled | |
| Wide Band Signal Processing Lab, EW, ICR... [Taiwan] | |
| 50600197 ITL | IECQ-L ULTW 17.0003 | | ULTW (TAIWAN ) | 2023/08/11 | Current | |
| WILLIAMSON ELECTRONIQUE [France] | |
| 01-D-00 | D-IECQ LCIE 07.0001 | | LCIE (France) | 2006/11/30 | Cancelled | |
| 01-D-00 | D-IECQ LCIE 07.0004 | | LCIE (France) | 2010/07/21 | Cancelled | |
| 01-D-00 | D-IECQ LCIE 05.0006 | | LCIE (France) | 2003/12/16 | Cancelled | |
| WIMA-Kondensatorenfabrik [Germany] | |
| 4425.5/11.78 | M-IECQ VDE 08.0012 | | VDE (Germany) | 2006/05/03 | Cancelled | |
| Winbond Electronics Corporation [Taiwan] | |
| T1074-5 | M-IECQ ECCB 07.0004 | | ULTW (United States of America) | 2007/07/04 | Cancelled | |
| T1074-4 | M-IECQ ECB 04.0080 | | ULTW (United States of America) | 1993/05/27 | Cancelled | |
| T1074-3 | M-IECQ ECB 04.0079 | | ULTW (United States of America) | 1993/05/27 | Cancelled | |
| T1074-2 | M-IECQ ECB 04.0078 | | ULTW (United States of America) | 1993/05/27 | Cancelled | |
| T1074-1 | M-IECQ ECB 04.0077 | | ULTW (United States of America) | 1993/05/27 | Cancelled | |
| WINSTEK SEMICONDUCTOR CORPORATION [Taiwan] | |
| T1105 | S-IECQ ECB 04.0008 | | ULTW (United States of America) | 2000/11/15 | Cancelled | |
| Winstek Semiconductor Co, Ltd Reliabilit... [Taiwan] | |
| 20002839 ITL | IECQ-L ULTW 18.0001 | | ULTW (TAIWAN ) | 2024/04/06 | Current | |
| Woo Sung Pre Ind Co, Ltd [Korea, Republic of] | |
| 0012/M/IECQ/KR | M-IECQ KTL 05.0014 | | KTL (Korea, Republic of) | 2002/04/20 | Cancelled | |
| 0012/M/IECQ/KR | M-IECQ KTL 06.0002 | | KTL (Korea, Republic of) | 2005/04/20 | Cancelled | |
| WUHAN GUANXING ELECTRONIC CO, LTD [China] | |
| 0318/M | M-IECQ CEP 06.0026 | | CEP (China) | 2004/09/24 | Cancelled | |
| WUHAN TELECOMMUNICATION DEVICES CO, LTD [China] | |
| 0188/M | M-IECQ CEP 06.0014 | | CEP (China) | 2005/10/12 | Cancelled | |
| WUXI CHINA RESOURCES HUAJING MICROELECTR... [China] | |
| 0001/M | M-IECQ CEP 07.0006 | | CEP (China) | 2007/07/20 | Cancelled | |
| 0001/M | M-IECQ CEP 06.0019 | | CEP (China) | 2004/08/13 | Cancelled | |
| WUXI SHARP ELECTRONIC COMPONENTS CO, LTD [China] | |
| 0316/M | M-IECQ CEP 10.0004 | | CEP (CHINA) | 2010/02/23 | Cancelled | |
| 0316/M | M-IECQ CEP 07.0003 | | CEP (China) | 2007/01/23 | Cancelled | |
| 0316/M | M-IECQ CEP 06.0003 | | CEP (China) | 2003/12/25 | Cancelled | |
| WUXI TOYO ELECTRIC CO, LTD [China] | |
| 0315/M | M-IECQ CEP 08.0004 | | CEP (CHINA) | 2006/09/26 | Cancelled | |