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

50687 Products showing for Fuses & Circuit Breakers

18 of 999+
RS PRO 30A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS stock no. 188-4612
Each
R 182.81(exc. VAT)
Schneider Electric, ComPacT MCCB 3P 630A, Breaking Capacity 50 kA, Fixed Mount
  • RS stock no. 260-8223
  • Mfr. Part No. C63N32D630
Each
R 102,696.27(exc. VAT)
Littelfuse SMD Non Resettable Fuse 500mA, 125V ac/dc
  • RS stock no. 541-3350
  • Mfr. Part No. 0451.500MRL
Each (In a Pack of 10)
R 25.977(exc. VAT)
ABB RCBO, 40A Current Rating, 4P Poles, Type B
  • RS stock no. 237-5216
  • Mfr. Part No. 2CSR274101R1405
Each
R 8,928.24(exc. VAT)
Eaton 5A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 852-7089
  • Mfr. Part No. MDA-5-R
Each
R 28.73(exc. VAT)
Schneider Electric, ComPacT New Generation MCCB 3P 150A, Fixed Mount
  • RS stock no. 260-7779
  • Mfr. Part No. C16H3MA150
Each
R 23,502.78(exc. VAT)
Littelfuse 60A Yellow BF1 Car Fuse, 32V dc
  • RS stock no. 431-6719
  • Mfr. Part No. 153.5631.5601
Each (In a Pack of 5)
R 76.928(exc. VAT)
RS PRO 400mA T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-615
Each (In a Pack of 10)
R 9.19(exc. VAT)
RS PRO 12.5A FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 420-224
Each (In a Pack of 10)
R 55.675(exc. VAT)
RS PRO 10A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 177-8099
Each (In a Pack of 5)
R 43.642(exc. VAT)
Rittal Earth Bar L. 450mm x W. 15mm x H. 5mm
  • RS stock no. 826-2868
  • Mfr. Part No. 7113000
Each
R 1,026.00(exc. VAT)
RS PRO 10A FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 420-218
Each (In a Pack of 10)
R 58.457(exc. VAT)
Littelfuse PC Board Non Resettable Fuse, Radial 50mA, 125V ac
  • RS stock no. 738-3309
  • Mfr. Part No. 39600500000
Each (In a Pack of 10)
R 44.842(exc. VAT)
Littelfuse 250A Panel Mount Fuse Block
  • RS stock no. 878-3946
  • Mfr. Part No. 02980900Z
Each
R 451.18(exc. VAT)
SIBA 10A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 418-9618
  • Mfr. Part No. 70-059-61/10A
Each (In a Pack of 10)
R 14.529(exc. VAT)
Better World
Schneider Electric Acti 9 C60H-DC MCB, 1P, 6A Curve C, 250V DC
  • RS stock no. 772-1502
  • Mfr. Part No. A9N61506
Each
R 559.66(exc. VAT)
Better World
Siemens 5sV3 RCCB, 63A, 2 Pole, 30mA, Type A, 230V ac
  • RS stock no. 211-9633
  • Mfr. Part No. 5SV3316-6
Each
R 5,141.84(exc. VAT)
Better World
Siemens Sentron 5SY4 MCB, 1P, 6A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS stock no. 383-2018
  • Mfr. Part No. 5SY4106-7
Each
R 457.00(exc. VAT)
Eaton 400A Centred Tag Fuse, NH2, 690V
  • RS stock no. 182-1765
  • Mfr. Part No. 170M5808D
Each
R 6,925.54(exc. VAT)
Better World
Schneider Electric, ComPacT NSX MCCB 4P 160A, Fixed Mount
  • RS stock no. 254-6341
  • Mfr. Part No. C16B42D160
Each
R 21,139.05(exc. VAT)
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