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| Manufacturer | CB Certificate No. | IECQ Certificate No. | | CB/NAI | Issue Date | Status | |
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| Kai Hwa Circuits Industrial Co, Ltd [Taiwan] | |
| KAMAYA ELECTRIC CO LTD [Japan] | |
| Kelan Circuits Limited [United Kingdom] | |
| KEMET de Mexico, SA de CV [Mexico] | |
| KEMET ELECTRONICS CORPORATION [Mexico] | |
| Kemet Electronics Oy [Finland] | |
| KOA EUROPE GmbH [Germany] | |
| KOA Kaohsiung Corp [Taiwan] | |
| KOMATSU MURATA MANUFACTURING CO LTD [Japan] | |
| Korea Electronics Inc [Korea, Republic of] | |
| Korea Technology Corporation [Korea, Republic of] | |
| KOSHIN ELECTRONICS CO LTD [Japan] | |
| KS TERMINALS INC [Taiwan] | |
| KUNIMI MEDIA DEVICE CO LTD [Japan] | |
| KUNSHAN STANDARD CO, LTD [China] | |
| KUSUMOTO CHEMICALS LTD ETAC Division Rel... [Japan] | |
| KUSUMOTO CHEMICALS LTD [Japan] | |
| | RCJ-00T-01-03 | IECQ-L RCJ 10.0016 | | RCJ (JAPAN) | 2011/08/01 | Cancelled | |
| | RCJ-00T-01-02 | IECQ-L RCJ 10.0015 | | RCJ (JAPAN) | 2009/07/24 | Cancelled | |
| | RCJ-00T-01-02 | IECQ-L RCJ 10.0015 | | RCJ (JAPAN) | 2011/08/01 | Cancelled | |
| | RCJ-00T-01-01 | IECQ-L RCJ 10.0014 | | RCJ (JAPAN) | 2011/08/01 | Cancelled | |
| | RCJ-00T-01 | IECQ-L RCJ 10.0013 | | RCJ (JAPAN) | 2011/08/01 | Cancelled | |
| | JQAQ0010-003-T | IECQ-L JQAJP 20.0001 | | JQAJP (JAPAN) | 2021/07/21 | Current | |
| | JQAQ0010-002-T | IECQ-L JQAJP 20.0001-01 | | JQAJP (JAPAN) | 2021/07/21 | Current | |
| Kyung Sung Electronics Co, Ltd [Korea, Republic of] | |
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