Fuses & Circuit Breakers

Although they work in different ways, fuses and circuit breakers broadly have the same purpose; to protect electrical appliances and electrical circuits from short circuits, and excessive current (called overcurrent or overload).

Fuses

Fuses are relatively low cost electrical safety devices. If too much current enters the circuit, the fuse will burn out (sometimes called blowing out). When the fuse blows out it breaks the circuit. This protects the attached devices and allows you to touch devices without being electrocuted. When the fuse blows, it must be replaced before using the device or appliance again.

Circuit breakers

Circuit breakers work in a similar way to fuses, but they are resettable. Once a fault is detected (this is typically a short circuit or an excessive amount of current flowing through the circuit) the circuit breaker will interrupt the flow of current. When the circuit breaker trips, it's simply a case of flicking a switch to reset the circuit breaker. As soon as you've reset the circuit breaker, it is ready to use again.

Circuit Breakers
Circuit Breakers
Earth & Lightning Protection
Earth & Lightning Protection
Fuse Holders & Accessories
Fuse Holders & Accessories
Fuses
Fuses

50973 Products showing for Fuses & Circuit Breakers

1 of 999+
RS PRO F, T Fuse Kit
  • RS Stock No. 893-8530
Each
£62.71
TE Connectivity Thermal Circuit Breaker - W58 Single Pole 50 V dc, 250V ac Voltage Rating, 12A Current Rating
  • RS Stock No. 782-7962
  • Mfr. Part No. W58-XB1A4A-12
Each
£6.79
Schurter Thermal Circuit Breaker - T11 Single Pole 240V ac Voltage Rating, 1A Current Rating
  • RS Stock No. 284-5798
  • Mfr. Part No. 4400.0008
Each
£8.72
Littelfuse Automotive Fuse Kit
  • RS Stock No. 219-9556
  • Mfr. Part No. 00940957XXN
Each
£44.56
Eaton RCCB, 63A, 2 Pole, 30mA, Type A, 230V ac
  • RS Stock No. 227-0738
  • Mfr. Part No. 267448 PFGM-63/2/003-A
Each
£66.44
Better World
Schneider Electric Acti 9 3 Phase Busbar, 415V ac, 18mm Pitch
  • RS Stock No. 776-2730
  • Mfr. Part No. A9XPH324
Each
£64.47
ETA Thermal Circuit Breaker - 1658 Single Pole 250V Voltage Rating Panel Mount, 10A Current Rating
  • RS Stock No. 273-0860
  • Mfr. Part No. 1658-G21-02-P10-10A
Each
£4.86
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 3P 630A, Breaking Capacity 20 kA, Fixed Mount
  • RS Stock No. 232-0088
  • Mfr. Part No. 1SDA054396R1 T5N630 FF PR221-LS 630A
Each
£1,959.54
TE Connectivity Thermal Circuit Breaker - W54 Single Pole 250V ac Voltage Rating, 20A Current Rating
  • RS Stock No. 782-7988
  • Mfr. Part No. W54-XB1A4A10-20
Each
£3.72
RS PRO MCB, 3P, 32A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0208
Each
£29.93
TE Connectivity Thermal Circuit Breaker - W58 Single Pole 50 V dc, 250V ac Voltage Rating, 5A Current Rating
  • RS Stock No. 782-0915
  • Mfr. Part No. W58-XB1A4A-5
Each
£5.89
Allen Bradley 1492-RCDA RCD, 25A, 2 Pole, 30mA, Type A
  • RS Stock No. 218-8688
  • Mfr. Part No. 1492-RCDA2A25-US
Each
£97.03
Eaton PXF-A RCCB, 40A, 3+N Pole, 30mA, Type A, 400V ac
  • RS Stock No. 490-466
  • Mfr. Part No. 236776 PXF-40/4/003-A
Each
£44.32
Eaton xPole MCB, 1+N, 2A Curve C, 230V AC, 4.5 kA Breaking Capacity
  • RS Stock No. 230-1077
  • Mfr. Part No. 264741 PLG4-C2/1N
Each
£12.28
ETA Thermal Circuit Breaker - 1658 Single Pole 250V Voltage Rating Panel Mount, 16A Current Rating
  • RS Stock No. 344-5333
  • Mfr. Part No. 1658-G21-02-P10-16A
Each
£4.86
ABB 4 Way Plastic Consumer Unit, 63A, IP65 Mistral65
  • RS Stock No. 811-1880
  • Mfr. Part No. 1SL1200A00 65P04X12
Each
£23.18
Eaton Eaton Moeller NZM Assembly Kit for use with N(S)2(-4), NZM2(-4), PN2(-4)
  • RS Stock No. 255-621
  • Mfr. Part No. 266633 NZM2-XHBR
Each
£119.90
RS PRO Earthing Strap Metal 12 → 32mm Diameter
  • RS Stock No. 390-2448
1 Pack of 10
£17.38
TE Connectivity Thermal Circuit Breaker - W57 Single Pole 250V ac Voltage Rating, 10A Current Rating
  • RS Stock No. 782-0867
  • Mfr. Part No. W57-XB7A4A10-10
Each
£3.43
Schneider Electric TeSys Thermal Circuit Breaker - TeSyS GV 3 Pole 690V Voltage Rating DIN Rail Mount, 40A Current
  • RS Stock No. 272-921
  • Mfr. Part No. GV3P40
Each
£207.04
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