Mae TRB Limited, sy’n is-gwmni ym mherchnogaeth lwyr y cwmni Tokai Rika o Japan, ar flaen y gad yn gweithgynhyrchu switshys modurol a ddefnyddir mewn cylchedau trydanol cerbydau. Maent yn rheoli mecanweithiau megis gwres, aerdymheru a ffenestri.
TRB Limited, a wholly owned subsidiary of the Japanese Tokai Rika company, is a leading manufacturer of automotive switches which are used in electrical circuits in vehicles. These control mechanisms such as heating, air conditioning and window controls