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
Fuses - PCB
Fuses - PCB

50690 Products showing for Fuses & Circuit Breakers

3 of 999+
RS PRO 6A F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 177-8113
Each (In a Pack of 50)
R 8.268(exc. VAT)
TE Connectivity Thermal Circuit Breaker - W58 Single Pole 50 V dc, 250V ac Voltage Rating, 30A Current Rating
  • RS stock no. 782-0918
  • Mfr Part No. W58-XB1A4A-30
Each
R 234.72(exc. VAT)
Better World
Siemens SENTRON Electronic Circuit Breaker 630A 3VA, 3 channels
  • RS stock no. 155-878
  • Mfr Part No. 3VA2463-0KQ32-0AA0
Each
R 70,365.38(exc. VAT)
Eaton 200A Bolted Tag Fuse, 415V ac, 92mm
  • RS stock no. 181-8845
  • Mfr Part No. 200MJ31-7
Each
R 1,489.95(exc. VAT)
Better World
Siemens SENTRON 5SL4 MCB, 1P, 20A Curve B, 400V AC, 72V DC
  • RS stock no. 210-3349
  • Mfr Part No. 5SL4120-6
Each
R 466.52(exc. VAT)
Better World
Siemens Sentron 5SY4 MCB, 1P, 16A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS stock no. 383-2030
  • Mfr Part No. 5SY4116-7
Each
R 379.00(exc. VAT)
RS PRO Residential RCCBs, 25A, 2 Pole, 30mA, Type A, 230V
  • RS stock no. 284-2367
Each
R 711.84(exc. VAT)
RS PRO MCB, 1P, 2A Curve C, 240 → 415V AC, 6 kA Breaking Capacity
  • RS stock no. 265-0190
Each
R 220.05(exc. VAT)
Better World
ABB System Pro M Compact S200 MCB, 2P, 6A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS stock no. 746-7706
  • Mfr Part No. 2CDS252001R0064 S202-C6
Each
R 1,141.07(exc. VAT)
Eaton xEffect MCB, 1P, 30A Curve C, 240 → 415V AC, 48V DC, 10 kA Breaking Capacity
  • RS stock no. 922-6911
  • Mfr Part No. 102093 FAZ-C30/1-NA
Each
R 947.38(exc. VAT)
RS PRO 500mA T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 721-1597
Each (In a Pack of 10)
R 24.075(exc. VAT)
RS PRO 10A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 668-6057
Each (In a Pack of 10)
R 1.808(exc. VAT)
RS PRO 2A F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-431
Each (In a Pack of 10)
R 1.264(exc. VAT)
Allen Bradley 1492-RCDA RCD, 25A, 2 Pole, 30mA, Type A
  • RS stock no. 218-8688
  • Mfr Part No. 1492-RCDA2A25-US
Each
R 2,475.72(exc. VAT)
Littelfuse 125A Pink BF1 Car Fuse, 32V dc
  • RS stock no. 431-6753
  • Mfr Part No. 153.5631.6121
Each (In a Pack of 5)
R 77.062(exc. VAT)
ETA Thermal Circuit Breaker - 1658 Single Pole 250V Voltage Rating Panel Mount, 5A Current Rating
  • RS stock no. 273-0854
  • Mfr Part No. 1658-G21-02-P10-5A
Each
R 123.64(exc. VAT)
Schneider Electric Acti 9 iC60H MCB, 1P, 32A Curve C, 230V AC, 72V DC, 10 kA Breaking Capacity
  • RS stock no. 776-8790
  • Mfr Part No. A9F84132
Each
R 151.50(exc. VAT)
Eaton 160A Bolted Tag Fuse, 415V ac, 92mm
  • RS stock no. 181-8853
  • Mfr Part No. 160MJ31-7
Each
R 1,479.95(exc. VAT)
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 1A Curve C, 100 → 133V AC, 72V DC, 10 kA Breaking Capacity
  • RS stock no. 791-3275
  • Mfr Part No. A9F54101
Each
R 554.65(exc. VAT)
Littelfuse 4A Pink Blade Car Fuse, 32V dc
  • RS stock no. 787-4158
  • Mfr Part No. 0287004.PXCN
Each (In a Pack of 10)
R 5.788(exc. VAT)
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