RCDs

An RCD (residual current device), has been designed to protect you from fatal electric shocks as it automatically switches off electricity when there is a fault. This potentially life-saving device protects against electrocution in instances where there is a bare wire, over-heating or earth faults.

RCDs are also known as an RCCB (residual-current circuit breaker) in the UK but in the United States and Canada they are referred to as a GFCI (ground fault circuit interrupter).
If RCDs are regularly tested, they are reliable life-saving devices, reducing the risk of electric shock and protecting your home against electrical fires.

How does an RCD work?
An RCD is placed within the circuits it has to protect. By monitoring the electric current, it can quickly detect when a circuit fails and electricity is flowing incorrectly. When the fault is detected, the RCD switches off the circuit so that the person handling the wires comes to no harm.
RCDs are often integrated with a fuse or MCB (miniature circuit breaker) adding protection when there are excessive current causing spikes or surges in the circuit.

Types of RCD
  • Fixed RCDs: they are installed in a fuse box and are used for both industrial and domestic applications. They protect lots of circuits and provide an excellent level of protection. RCDs located within a consumer power distribution unit are mostly passive. This allows household appliances to re-establish normal operation when the circuit power is restored.
  • Socket-Outlet RCDs: they provide individual protection to the person who is in contact with the equipment. They can be used in place of a standard socket outlet. Socket-outlet RCDs are either active or passive. They are latching in operation so are not ideal for power tools which do not require a restart when the circuit is restored.
  • Portable RCDs: they also only provide individual protection to the person who is in contact with the equipment. They plug into any standard socket, and the appliance is then plugged into the RCD. Portable RCDs are mostly active and unlatch when any abnormality is detected. People who use outside power tools would benefit from a portable RCD as their equipment could become dangerous if they were suddenly reactivated.

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Description Price Number of Poles Current Rating Model Number Trip Sensitivity Rated AC Voltage Rated DC Voltage Mounting Style Range Break Time Series Application Breaking Capacity Circuit Breaker Type Earth Leakage Protection Type
RS Stock No. 863-7767
Mfr. Part No.4 117 02
BrandLegrand
kr 667,69
Each
Units
3 + N 25 A - 30mA 400 V - DIN Rail - - 4117 - - - -
RS Stock No. 732-0095
Mfr. Part No.4 116 31
BrandLegrand
kr 924,95
Each
Units
1 + N 25 A - 30mA 230 V - - - - DX3 - - - -
RS Stock No. 863-7754
Mfr. Part No.4 115 00
BrandLegrand
kr 759,46
Each
Units
1 + N 16 A - 10mA 230 V - DIN Rail - - 4115 - - - -
RS Stock No. 731-9843
Mfr. Part No.4 107 13
BrandLegrand
kr 1 831,55
Each
Units
1 + N 16 A - 30mA - - - - - DX3 - - - -
RS Stock No. 731-9847
Mfr. Part No.4 107 05
BrandLegrand
kr 1 831,55
Each
Units
1 + N 16 A - 30mA - - - - - DX3 - - - -
RS Stock No. 731-9884
Mfr. Part No.4 107 84
BrandLegrand
kr 2 495,60
Each
Units
1 + N 10 A - 30mA - - - - - DX3 - - - -
RS Stock No. 731-9856
Mfr. Part No.4 107 06
BrandLegrand
kr 1 820,18
Each
Units
1 + N 20 A - 30mA - - - - - DX3 - - - -
RS Stock No. 732-0011
Mfr. Part No.4 112 10
BrandLegrand
kr 8 336,42
Each
Units
3 + N 50 A - 300mA 400 V - - - - DX3 - - - -
RS Stock No. 731-9812
Mfr. Part No.4 104 71
BrandLegrand
kr 2 552,82
Each
Units
3 40 A - 30mA - - - - - DX3 - - - -
RS Stock No. 731-9887
Mfr. Part No.4 107 85
BrandLegrand
kr 2 392,52
Each
Units
1 + N 16 A - 30mA - - - - - DX3 - - - -
RS Stock No. 732-0106
Mfr. Part No.4 116 35
BrandLegrand
kr 1 111,37
Each
Units
1 + N 40 A - 300mA 230 V - - - - DX3 - - - -
RS Stock No. 731-9859
Mfr. Part No.4 107 14
BrandLegrand
kr 1 820,18
Each
Units
1 + N 20 A - 30mA - - - - - DX3 - - - -
RS Stock No. 731-9935
Mfr. Part No.4 108 16
BrandLegrand
kr 2 518,43
Each
Units
1 + N 32 A - 300mA - - - - - DX3 - - - -
RS Stock No. 731-9979
Mfr. Part No.4 111 88
BrandLegrand
kr 3 960,78
Each
Units
3 + N 25 A - 30mA 400 V - - - - DX3 - - - -
RS Stock No. 732-0067
Mfr. Part No.4 116 14
BrandLegrand
kr 1 144,67
Each
Units
1 + N 40 A - 300mA - - - - - DX3 - - - -
RS Stock No. 731-9893
Mfr. Part No.4 108 02
BrandLegrand
kr 2 334,30
Each
Units
1 + N 20 A - 30mA 230 V - - - - DX3 - - - -
RS Stock No. 732-0017
Mfr. Part No.4 111 90
BrandLegrand
kr 4 278,99
Each
Units
3 + N 40 A - 30mA 400 V - - - - DX3 - - - -
RS Stock No. 731-9890
Mfr. Part No.4 107 86
BrandLegrand
kr 2 381,05
Each
Units
1 + N 20 A - 30mA - - - - - DX3 - - - -
RS Stock No. 731-9626
Mfr. Part No.4 111 65
BrandLegrand
kr 2 564,19
Each
Units
1 + N 20 A - 30mA - - - - - DX3 - - - -
RS Stock No. 732-0045
Mfr. Part No.4 116 16
BrandLegrand
kr 1 085,15
Each
Units
1 + N 25 A - 30mA - - - - - DX3 - - - -