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. 511-9121
Mfr. Part No.ELRM44V-30 115/230VAC
kr 1 163,50
Each
Units
- 8 A - 30 → 30000mA 115 → 230 V - DIN Rail Mount - Instantaneous, Time Delay ELRM - - - -
RS Stock No. 922-8591
Mfr. Part No.PFIM-16/2/001-MW
BrandEaton
kr 994,35
Each
Units
1 + N 16 A - 10mA 230 → 400 V - DIN Rail PFIM Instantaneous PFIM - - RCCB -
RS Stock No. 776-7466
Mfr. Part No.A9Z21440
kr 845,38
Each
Units
- 40 A - 30mA 400 V, 415 V - DIN Rail Mount Acti 9 Instantaneous iID - - - -
RS Stock No. 191-6075
Mfr. Part No.A9DA6610
kr 2 177,02
Each
Units
1 + N 10 A Acti9iDD40T 300mA 230 V ac - DIN Rail Mount Acti9 Instantaneous - - 6 kA, 4500 A - Type AC
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. 124-7745
Mfr. Part No.5SV3646-6KL
BrandSiemens
kr 1 435,68
Each
Units
3 + N 63 A - 300mA 400 V ac - DIN Rail Sentron Instantaneous 5SV3 Industrial, Non-Residential, Residential - RCCB -
RS Stock No. 191-6076
Mfr. Part No.A9DA6616
kr 2 177,02
Each
Units
1 + N 16 A Acti9iDD40T 300mA 230 V ac - DIN Rail Mount Acti9 Instantaneous - - 6 kA, 4500 A - Type AC
RS Stock No. 239-4969
Mfr. Part No.7540.4801.3
BrandKopp
kr 386,11
Each
Units
3 + N 40 A - 30mA 400 V - DIN Rail - Instantaneous - - - - -
RS Stock No. 922-8698
Mfr. Part No.PKNM-6/1N/C/003-MW
BrandEaton
kr 961,80
Each
Units
1 + N 6 A - 30mA 230 V - DIN Rail PKNM Instantaneous PKNM - - MCB, RCD -
RS Stock No. 610-3391
Mfr. Part No.2CSB203101R3400 - DDA203 A-40/0.3
BrandABB
kr 653,23
Each
Units
3 40 A - 300mA 415 V - DIN Rail pro M compact - DDA 200 A - - - -
RS Stock No. 825-6062
Mfr. Part No.P1RC2P25AC030
BrandLovato
kr 412,00
Each
Units
1 + N 25 A - 30mA 230 V - DIN Rail Mount - - P1RC - - - -
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. 538-3855
Mfr. Part No.2CSF204001R1900
BrandABB
kr 1 981,24
Each
Units
4P 100 A - 30mA - - DIN Rail Mount System M Pro - F200 - - - -
RS Stock No. 136-8609
Mfr. Part No.1492-RCDA4D25
kr 1 136,49
Each
Units
3 + N 25 A - 500mA 230 V, 400 V - DIN Rail Mount - - 1492-RCDA Industrial 1 (Residual) kA, 10 (Short-Circuit) kA RCD -
RS Stock No. 922-8689
Mfr. Part No.PFIM-63/4/03-A-MW
BrandEaton
kr 1 269,45
Each
Units
3 + N 63 A - 300mA 230 → 400 V - DIN Rail PFIM Instantaneous PFIM - - RCCB -
RS Stock No. 183-3548
Mfr. Part No.167897
BrandEaton
kr 5 479,47
Each
Units
3 + N 40 A - 300mA 240 V 220V DIN Rail FRCdM Time Delay FRCDM Industrial and Advanced Commercial Applications 500 A RCD -
RS Stock No. 776-7441
Mfr. Part No.A9Z24291
kr 5 712,38
Each
Units
1 + N 100 A - 300mA 230 V, 240 V - DIN Rail Acti 9 Instantaneous iID - - - -
RS Stock No. 136-8591
Mfr. Part No.1492-RCDA2A40
kr 1 286,03
Each
Units
1 + N 40 A - 30mA 230 V, 400 V - DIN Rail Mount - - 1492-RCDA Industrial 1 (Residual) kA, 10 (Short-Circuit) kA RCD -
RS Stock No. 490-434
Mfr. Part No.PXF-80/4/05-A
BrandEaton
kr 5 652,99
Each
Units
3 + N 80 A - 500mA 400 V - DIN Rail PXF - PXF-A - - - -
RS Stock No. 239-4931
Mfr. Part No.7525.4301.1
BrandKopp
kr 388,27
Each
Units
3 + N 25 A - 300mA 400 V - DIN Rail - Instantaneous - - - - -
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