Idec RR Series SocketFeaturing the same contact ratings as the larger RR series, the RH series uses silver cadmium oxide contacts to help reduce voltage arcing. Available in 1 to 4 poles, with either .187 blade plug-in or PCB terminals, the RH series is known for going the distance. Options include manual check buttons, LED indicators, and top flange covers for direct surface mounting. All models carry worldwide approvals including UL, CSA, TUV and CE. Using a standard terminal arrangement, the RH series will plug into many competitors’ sockets. In fact, since we private label sockets for so many companies, there is a good chance that the socket you are using was designed specifically for RH series relays.