1. TDK Corporation
2. Panasonic Corp.
3. TT Electronics plc
4. Vishay Intertechnology Inc.
5. Sumida Corporation
6. Bourns Inc.
7. GCI technologies
8. Bel Fuse Inc.
9. Taiyo Yuden Co. Ltd.
10. W?rth Elektronik GmbH & Co. KG