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 Breaking Capacity at Maximum Voltage Rating Circuit Breaker Type Overall Depth Overall Dimensions
RS Stock No. 734-9210
Mfr. Part No.A9V11463
MYR2,878.92
Each
units
- - - - - - - - - - - - - -
RS Stock No. 922-8670
Mfr. Part No.235443 & PFIM-63/4/003-A-MW
BrandEaton
MYR1,056.94
Each
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- 63A - 30mA 230 → 400V - DIN Rail PFIM Instantaneous PFIM - RCCB 80mm 70 x 65.5 x 80mm
RS Stock No. 922-8591
Mfr. Part No.235389 & PFIM-16/2/001-MW
BrandEaton
MYR672.53
Each
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- 16A - 10mA 230 → 400V - DIN Rail PFIM Instantaneous PFIM - RCCB 80mm 35 x 65.5 x 80mm
RS Stock No. 176-807
Mfr. Part No.2CCL562111E0165 - FS401E-B16/0.03
BrandABB
MYR659.79
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2 16 A - 30mA 230 V - - SmiSSline - FS401 - - - -
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Mfr. Part No.A9D53606
MYR1,267.59
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RS Stock No. 124-7729
Mfr. Part No.5SV3314-6
BrandSiemens
MYR528.09
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- 40A - 30mA 230V - DIN Rail Sentron Instantaneous 5SV3 - RCCB 89.8mm 35.8 x 77.2 x 89.8mm
RS Stock No. 731-9871
Mfr. Part No.4 107 83
BrandLegrand
MYR1,862.27
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Mfr. Part No.2CSB204101R4630 - DDA204 A-63/0,5
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BrandABB
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Mfr. Part No.235441 & PFIM-40/4/03-A-MW
BrandEaton
MYR772.52
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4 40A - 300mA 230 → 400V - DIN Rail PFIM Instantaneous PFIM - RCCB 80mm 70 x 65.5 x 80mm
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Mfr. Part No.235440 & PFIM-40/4/01-A-MW
BrandEaton
MYR816.88
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- 40A - 100mA 230 → 400V - DIN Rail PFIM Instantaneous PFIM - RCCB 80mm 70 x 65.5 x 80mm
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Mfr. Part No.5SV3314-6KK12
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MYR664.61
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- 40A - 30mA 230V - DIN Rail Sentron Instantaneous 5SV3 - RCCB 89.8mm 35.8 x 77.2 x 89.8mm
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Mfr. Part No.A9R15480
MYR2,598.84
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MYR2,687.00
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RS Stock No. 863-7751
Mfr. Part No.4 115 06
BrandLegrand
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Mfr. Part No.5SV3646-6
BrandSiemens
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- 63A - 300mA 400V - DIN Rail Sentron Instantaneous 5SV3 - RCCB 89.8mm 71.8 x 77.2 x 89.8mm
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Mfr. Part No.235424 & PFIM-25/2/003-A-MW
BrandEaton
MYR651.46
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- 25A - 30mA 230 → 400V - DIN Rail PFIM Instantaneous PFIM - RCCB 80mm 35 x 65.5 x 80mm