| S.no | Company Name | Founded | Country |
|---|---|---|---|
| 1 | WAGO Corp. | USA | |
| 2 | Cit Relay & Switch | USA | |
| 3 | Yaskawa America Inc. – Drives & Motion Division | USA | |
| 4 | Ross Engineering Corp. | USA | |
| 5 | BK Vibro America Inc. | USA | |
| 6 | Opto 22 | USA | |
| 7 | SE Relays | USA | |
| 8 | Weschler Instruments – Div. of Hughes Corp. | USA | |
| 9 | DFX Technologies LLC | USA | |
| 10 | TE Connectivity | USA | |
| 11 | Celduc Inc. | USA | |
| 12 | LFE/API Meters | USA | |
| 13 | PICS INC | USA | |
| 14 | Perfect Switch LLC | USA | |
| 15 | Esterline Power Systems | USA | |
| 16 | Phoenix Contact | USA | |
| 17 | Trombetta Inc. | USA | |
| 18 | Airotronics Timers and Controls | USA | |
| 19 | Comus International | USA | |
| 20 | DARE Electronics Inc. | USA | |
| 21 | STK Electronics Inc. | USA | |
| 22 | CII Technologies | USA | |
| 23 | Kilovac Products From CII Technologies | USA |
