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. 490-163
Mfr. Part No.236740 & PXF-16/2/03-A
BrandEaton
kr 1 052,83
Each
Units
1 + N 16 A - 300mA 230 V - DIN Rail PXF - PXF-A - - - -
RS Stock No. 922-8591
Mfr. Part No.235389 & PFIM-16/2/001-MW
BrandEaton
kr 1 066,69
Each
Units
1 + N 16 A - 10mA 230 → 400 V - DIN Rail PFIM Instantaneous PFIM - - RCCB -
RS Stock No. 732-0095
Mfr. Part No.4 116 31
BrandLegrand
kr 967,19
Each
Units
1 + N 25 A - 30mA 230 V - - - - DX3 - - - -
RS Stock No. 178-257
Mfr. Part No.2CCF544110E0250 - F404A-25/0.03, 2CC
BrandABB
kr 990,62
Each
Units
3 + N 25 A - 30mA 400 V - - SmiSSline Instantaneous F404 - - - -
RS Stock No. 183-3637
Mfr. Part No.442053
BrandABB
kr 1 133,29
Each
Units
3 + N 40 A F204 300mA 400 V - DIN Rail - - FH200 Domestic - RCD -
RS Stock No. 790-9456
Mfr. Part No.A9D55620
kr 1 892,16
Each
Units
- 20 A - 30mA 230 V - DIN Rail Acti 9 Instantaneous iDPN - - - -
RS Stock No. 136-8605
Mfr. Part No.1492-RCDA4D40
kr 1 168,99
Each
Units
3 + N 40 A - 500mA 230 V, 400 V - DIN Rail - - 1492-RCDA Industrial 1 (Residual) kA, 10 (Short-Circuit) kA RCD -
RS Stock No. 239-4925
Mfr. Part No.7525.4801.6
BrandKopp
kr 393,87
Each
Units
3 + N 25 A - 30mA 400 V - DIN Rail - Instantaneous - - - - -
RS Stock No. 922-8730
Mfr. Part No.236239 & PKNM-20/1N/B/003-A-MW
BrandEaton
kr 1 204,38
Each
Units
1 + N 20 A - 30mA 230 V - DIN Rail PKNM Instantaneous PKNM - - MCB, RCD -
RS Stock No. 183-3638
Mfr. Part No.442043
BrandABB
kr 1 045,26
Each
Units
3 + N 25 A F204 300mA 400 V - DIN Rail - - FH200 Domestic - RCD -
RS Stock No. 178-263
Mfr. Part No.2CSF502110R1250
BrandABB
kr 739,38
Each
Units
1 + N 25 A - 30mA 230 V - - SmiSSline Instantaneous F402 - - - -
RS Stock No. 790-9484
Mfr. Part No.A9D55640
kr 1 185,05
Each
Units
- 40 A - 30mA 230 V - DIN Rail Acti 9 Instantaneous iDPN - - - -
RS Stock No. 922-8642
Mfr. Part No.235424 & PFIM-25/2/003-A-MW
BrandEaton
kr 1 032,89
Each
Units
1 + N 25 A - 30mA 230 → 400 V - DIN Rail PFIM Instantaneous PFIM - - RCCB -
RS Stock No. 183-3639
Mfr. Part No.442151
BrandABB
kr 1 668,80
Each
Units
3 + N 40 A F204 30mA 400 V - DIN Rail - - FH200 Domestic - RCD -
RS Stock No. 136-8606
Mfr. Part No.1492-RCDA4B40S
kr 2 183,26
Each
Units
3 + N 40 A - 100mA 230 V, 400 V - DIN Rail - Time Delay 1492-RCDA Industrial 1 (Residual) kA, 10 (Short-Circuit) kA RCD -
RS Stock No. 183-3548
Mfr. Part No.167897 & FRCDM-40/4/03-G/B
BrandEaton
kr 4 777,62
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. 922-8733
Mfr. Part No.236245 & PKNM-20/1N/C/003-MW
BrandEaton
kr 1 032,69
Each
Units
1 + N 20 A - 30mA 230 V - DIN Rail PKNM Instantaneous PKNM - - MCB, RCD -
RS Stock No. 176-807
Mfr. Part No.2CCL562111E0165 - FS401E-B16/0.03
BrandABB
kr 818,34
Each
Units
1 + N 16 A - 30mA 230 V - - SmiSSline - FS401 - - - -
RS Stock No. 176-891
Mfr. Part No.2CCF544110E0630 - F404A-63/0.03, 2CC
BrandABB
kr 1 744,35
Each
Units
3 + N 63 A - 30mA 400 V - - SmiSSline Instantaneous F404 - - - -
RS Stock No. 790-9487
Mfr. Part No.A9D69632
kr 2 229,12
Each
Units
- 32 A - 300mA 230 V - DIN Rail Acti 9 - iDPN - - - -
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