| S.no | Company Name | Founded | Country |
|---|---|---|---|
| 1 | Amperite Co. | USA | |
| 2 | U.S. Tsubaki Inc. | USA | |
| 3 | SE Relays | USA | |
| 4 | Instrumentation & Control Systems Inc. | USA | |
| 5 | Perfect Switch LLC | USA | |
| 6 | PICS INC | USA | |
| 7 | c3controls | USA | |
| 8 | Esterline Power Systems | USA | |
| 9 | LFE/API Meters | USA | |
| 10 | Macromatic Industrial Controls Inc. | USA | |
| 11 | Airotronics Timers and Controls | USA | |
| 12 | STK Electronics Inc. | USA |
