| S.no | Company Name | Founded | Country |
|---|---|---|---|
| 1 | U.S. Tsubaki Inc. | USA | |
| 2 | Pilz Automation Safety L.P. | USA | |
| 3 | ABB E-mobility | USA | |
| 4 | Littelfuse Inc. | USA | |
| 5 | SE Relays | USA | |
| 6 | Siemens Corporation | USA | |
| 7 | ABB | USA | |
| 8 | NTE Electronics Inc. | USA | |
| 9 | Eaton Crouse-Hinds Division | USA | |
| 10 | National Switchgear Sytems Inc | USA | |
| 11 | PICS INC | USA | |
| 12 | Sylvania | USA | |
| 13 | Celduc Inc. | USA | |
| 14 | Western Reserve Controls Inc. | USA | |
| 15 | Basler Electric Co. | USA | |
| 16 | C R Magnetics Inc. | USA | |
| 17 | STK Electronics Inc. | USA | |
| 18 | MCI Transformer Corp. | USA |
