Call 020 8768 8080

Our last dispatch before Easter will be on the 17th April for all orders placed before 2pm that day. For all orders after that, our next dispatch day will be the 22nd April.

View Easter closures

Residual Current Device (RCD) and Residual Current Circuit Breakers (RCCB) - All Makes

Special Offers

New deals daily!

Available now

Click here »

Hurry!

While stocks last

All Makes of DIN Rail Mountable RCD's , brought together for easy selection

A residual-current device (RCD), or residual-current circuit breaker (RCCB) is an electrical wiring device that disconnects a circuit whenever it detects that the electric current is not balanced between the energized conductor and the return neutral conductor. Such an imbalance may indicate current leakage through the body of a person who is grounded and accidentally touching the energized part of the circuit. A lethal shock can result from these conditions. RCCBs are designed to disconnect quickly enough to prevent injury caused by such shocks. They are not intended to provide protection against overcurrent (overload) or all short-circuit conditions.