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.

...
Read more Read less

Filters

Viewing 1 - 20 of 391 products
Results per page
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 Earth Leakage Protection Type Overall Depth
RS Stock No. 124-7741
Mfr. Part No.5SV3644-6
BrandSiemens
TWD3,854.00
Each
units
- 40A - 300mA 400V - DIN Rail Sentron Instantaneous 5SV3 - RCCB - 89.8mm
RS Stock No. 511-9121
Mfr. Part No.ELRM44V-30 115/230VAC
TWD5,980.00
Each
units
- 8A - 30 → 30000mA 230V - DIN Rail - - ELRM - - - -
RS Stock No. 124-7742
Mfr. Part No.5SV3644-6KK12
BrandSiemens
TWD4,813.00
Each
units
- 40A - 300mA 400V - DIN Rail Sentron Instantaneous 5SV3 - RCCB - 89.8mm
RS Stock No. 776-2887
Mfr. Part No.A9V01263
TWD17,531.00
Each
units
- 63A - 30mA 130V - DIN Rail Mount Acti 9 Instantaneous iC60 - - - -
RS Stock No. 667-0620
Mfr. Part No.235403 & PFIM-80/2/01-MW
BrandEaton
TWD4,986.00
Each
units
1+N 80A - 100mA - - DIN Rail XBoard - PFIM - - - -
RS Stock No. 183-3637
Mfr. Part No.442053
BrandABB
TWD6,816.00
Each
units
- 40A F204 300mA 400V - DIN Rail - - FH200 - RCD - 85mm
RS Stock No. 776-2890
Mfr. Part No.A9V04263
TWD11,782.00
Each
units
- 63A - 300mA 130V - DIN Rail Mount Acti 9 Instantaneous iC60 - - - -
RS Stock No. 667-0624
Mfr. Part No.235410 & PFIM-40/4/003-MW
BrandEaton
TWD4,985.00
Each
units
3+N 40A - 30mA - - DIN Rail XBoard - PFIM - - - -
RS Stock No. 183-3638
Mfr. Part No.442043
BrandABB
TWD6,285.00
Each
units
- 25A F204 300mA 400V - DIN Rail - - FH200 - RCD - 85mm
RS Stock No. 201-0759
Mfr. Part No.CPR100030T
BrandContactum
TWD3,121.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 776-3711
Mfr. Part No.A9R15480
TWD16,500.00
Each
units
- 80A - 300mA 400 V, 415V - DIN Rail Mount Acti 9 Time Delay iID - - - -
RS Stock No. 179-9692
Mfr. Part No.A9N18569
TWD7,023.00
Each
units
4 125A - 30mA 415V - DIN Rail Mount Acti 9 Instantaneous Vigi C120 - RCD - 73mm
RS Stock No. 776-2893
Mfr. Part No.A9V39263
TWD17,060.00
Each
units
- 63A - - 230 V, 400 V, 415V - DIN Rail Mount Acti 9 Time Delay iC60 - - - -
RS Stock No. 731-9881
Mfr. Part No.4 108 01
BrandLegrand
TWD11,330.00
Each
units
1+N 16A - 30mA 230V - - - - DX3 - - - -
RS Stock No. 667-0627
Mfr. Part No.235402 & PFIM-80/2/003-MW
BrandEaton
TWD5,362.00
Each
units
1+N 80A - 30mA - - - XBoard - PFIM - - - -
New
RS Stock No. 225-6073
Mfr. Part No.2CSB202101R1250
BrandABB
TWD3,617.00
Each
units
2 25A DDA202 A-25/0.03 30mA 400V - DIN Rail - - DDA200 - - - -
RS Stock No. 191-6139
Mfr. Part No.A9Y13725
TWD8,504.00
Each
units
3 25A Acti9iTG40 300mA 400V - DIN Rail Acti9 Instantaneous - - - Type AC 91mm
New
RS Stock No. 218-1787
Mfr. Part No.3VA9113-0RL21
BrandSiemens
TWD65,093.00
Each
units
3 160A 3VA11 - 690V 127V - SENTRON - 3VA11 - - - -
RS Stock No. 732-0083
Mfr. Part No.4 115 55
BrandLegrand
TWD4,489.00
Each
units
1+N 40A - 30mA 230V - - - - DX3 - - - -
RS Stock No. 183-3547
Mfr. Part No.167893 & FRCDM-40/4/003-G/B
BrandEaton
TWD24,939.00
Each
units
4P 40A - 30mA 240V 220V DIN Rail FRCdM Time Delay FRCDM 500 A RCD - 80mm