| S.no | Company Name | Founded | Country |
|---|---|---|---|
| 1 | Cit Relay & Switch | USA | |
| 2 | Amperite Co. | USA | |
| 3 | SE Relays | USA | |
| 4 | GAMA Electronics Inc. | USA | |
| 5 | Jameco Electronic Components & Computer Products | USA | |
| 6 | TE Connectivity | USA | |
| 7 | Firgelli Automations | USA | |
| 8 | Automation Systems Interconnect Inc. | USA | |
| 9 | Infitec Inc. | USA | |
| 10 | HBcontrols Inc. | USA | |
| 11 | Phidgets Inc | USA | |
| 12 | American Zettler Inc. | USA |
