- Schneider Electric (formerly APC)
- Artesyn(formerly Emerson)
- Littlefuse
- First Sumiden
- Acbel
- Fastech
- Danam
- Wyntron
- IMI
- International Precision
- DKP
- P. Imes
- Ionics
- Excelitas
- Minami EMS
- Shimadzu
- EMS
- Kimpo
- CIRTEK
- AMS
- Eaton (formerly Cooper Bussman)
- Tsukiden Electronics
- GBPlen
- Sharp
- IMI (formerly Speedy Tech)
- MEC Electroics
- Hayakawa
- Analog Devices
- BAG Electronics
- Tong Hsing
- Hitachi
- NidecCopal
- Nidec
- Toshiba
- Vishay
- LEAR