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 Overall Depth
RS Stock No. 776-3694
Mfr. Part No.A9R12263
MYR1,676.68
Each
units
- 63 A - 100mA 230 V, 240 V - DIN Rail Mount Acti 9 Instantaneous iID - - - -
RS Stock No. 511-9121
Mfr. Part No.ELRM44V-30
MYR693.73
Each
units
- 8 A - 30 → 30000mA 115 → 230 V - DIN Rail Mount - Instantaneous, Time Delay ELRM - - - -
RS Stock No. 776-8731
Mfr. Part No.A9V41225
MYR785.87
Each
units
- 25 A - 30mA 400 V - DIN Rail Mount Acti 9 Instantaneous iC60 - - - -
RS Stock No. 776-2878
Mfr. Part No.A9Q01225
MYR1,272.07
Each
units
- 25 A - 30mA 130 V - DIN Rail Mount Acti 9 Instantaneous iC60 - - - -
RS Stock No. 776-9116
Mfr. Part No.A9R75440
MYR198.46
Each
units
4P 40 A - 300mA 400 V, 415 V - DIN Rail Mount Acti 9 Instantaneous iIDK - - - -
RS Stock No. 538-3861
Mfr. Part No.2CSF204001R3900
BrandABB
MYR1,401.35
Each
units
4 100 A - 300mA - - DIN Rail System M Pro - F200 - - - -
RS Stock No. 776-3691
Mfr. Part No.A9R12240
MYR1,027.79
Each
units
- 40 A - 100mA 230 V, 240 V - DIN Rail Mount Acti 9 Instantaneous iID - - - -
RS Stock No. 776-8722
Mfr. Part No.A9V10225
MYR706.60
Each
units
2 25 A - 10mA 400 V - DIN Rail Acti 9 Instantaneous iC60 - - - -
RS Stock No. 776-9090
Mfr. Part No.A9R75240
MYR144.33
Each
units
DP 40 A - 300mA 230 V, 240 V - DIN Rail Mount Acti 9 Instantaneous iIDK - - - -
RS Stock No. 734-9185
Mfr. Part No.A9Q11325
MYR1,457.49
Each
units
- 25 A - 30mA 415 V - DIN Rail Mount Acti 9 Instantaneous iC60 - - - -
RS Stock No. 490-466
Mfr. Part No.PXF-40/4/003-A
BrandEaton
MYR217.49
Each
units
4 40 A - 30mA 400 V - DIN Rail PXF - PXF-A - - - -
RS Stock No. 124-7725
Mfr. Part No.5SV3111-6
BrandSiemens
MYR484.88
Each
units
2 16 A - 10mA 230 V ac - DIN Rail Sentron Instantaneous 5SV3 Industrial, Non-Residential, Residential - RCCB 89.8mm
RS Stock No. 731-9932
Mfr. Part No.4 111 58
BrandLegrand
MYR1,255.88
Each
units
2 16 A - 30mA - - - - - DX3 - - - -
RS Stock No. 863-7754
Mfr. Part No.4 115 00
BrandLegrand
MYR413.93
Each
units
2 16 A - 10mA 230 V - DIN Rail - - 4115 - - - -
RS Stock No. 790-9428
Mfr. Part No.A9D48610
MYR978.56
Each
units
- 10 A - 300mA 230 V - DIN Rail, DIN Rail Mount Acti 9 - iDPN - - - -
RS Stock No. 731-9890
Mfr. Part No.4 107 86
BrandLegrand
MYR1,161.52
Each
units
2 20 A - 30mA - - - - - DX3 - - - -
RS Stock No. 776-9093
Mfr. Part No.A9R75225
MYR228.52
Each
units
DP 25 A - 300mA 230 V, 240 V - DIN Rail Mount Acti 9 Instantaneous iIDK - - - -
RS Stock No. 538-3855
Mfr. Part No.2CSF204001R1900
BrandABB
MYR1,003.03
Each
units
4P 100 A - 30mA - - DIN Rail Mount System M Pro - F200 - - - -
RS Stock No. 826-3344
Mfr. Part No.7860S
MYR299.41
Each
units
2 63 A - 30mA 230 V - DIN Rail Sentry Selective 7860S - - - -
RS Stock No. 734-9210
Mfr. Part No.A9V11463
MYR2,302.18
Each
units
- 63 A - 30mA 415 V - DIN Rail Mount Acti 9 Instantaneous iC60 - - - -
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