| S.no | Company Name | Founded | Country |
|---|---|---|---|
| 1 | Amperite Co. | USA | |
| 2 | AEI | USA | |
| 3 | Pilz Automation Safety L.P. | USA | |
| 4 | Struthers-Dunn Inc. | USA | |
| 5 | Littelfuse Inc. | USA | |
| 6 | SE Relays | USA | |
| 7 | TE Connectivity | USA | |
| 8 | Song Chuan USA | USA | |
| 9 | Esterline Power Systems | USA | |
| 10 | Jameco Electronic Components & Computer Products | USA | |
| 11 | Mercury Displacement Industries Inc. (MDI Inc.) | USA | |
| 12 | Macromatic Industrial Controls Inc. | USA | |
| 13 | PICS INC | USA | |
| 14 | ABB | USA | |
| 15 | SSAC Inc. | USA | |
| 16 | Deltrol Controls | USA | |
| 17 | Whelen Engineering Co. Inc. | USA | |
| 18 | DARE Electronics Inc. | USA | |
| 19 | STK Electronics Inc. | USA | |
| 20 | HBcontrols Inc. | USA | |
| 21 | Span Manufacturing Inc. | USA | |
| 22 | Manex Corp. | USA |
