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

7 of 999+
Being discontinued
RS PRO 2A T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-722
Each (In a Pack of 10)
R 6.811(exc. VAT)
In Stock
RS PRO 32A British Standard Fuse, A2, 550V ac, 73mm
  • RS stock no. 521-2624
Each (In a Pack of 5)
R 121.394(exc. VAT)
Temporarily out of stock
Schneider Electric, PowerPact Circuit breaker 3P 150A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS stock no. 357-931
  • Mfr. Part No. NHDL36150U31X
Each
R 46,930.75(exc. VAT)
In Stock
RS PRO Three Phase Industrial Surge Protector, 40kA, 1.35kV, DIN Rail Mount
  • RS stock no. 101-792
Each
R 9,350.49(exc. VAT)
In Stock
Better World
Schneider Electric, ComPacT New Generation Circuit breaker 3P 250A, Breaking Capacity 36 kA, Fixed Mount
  • RS stock no. 254-6357
  • Mfr. Part No. C25F3TM250
Each
R 34,078.44(exc. VAT)
In Stock
Eaton 6A T Cartridge Fuse, 21 x 57mm
  • RS stock no. 773-3536
  • Mfr. Part No. LPJ-6SP
Each
R 1,322.27(exc. VAT)
In Stock
RS PRO 40A Ceramic Cartridge Fuse, 10 x 38mm
  • RS stock no. 188-4632
Each
R 414.25(exc. VAT)
In Stock
ABB 12 Way Plastic Consumer Unit, 63A, IP65 Mistral65
  • RS stock no. 183-3758
  • Mfr. Part No. 1SLM006500A2212
Each
R 983.17(exc. VAT)
In Stock
Eaton 6.3A T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 537-1307
  • Mfr. Part No. S506-6.3-R
Each (In a Pack of 10)
R 4.19(exc. VAT)
In Stock
TE Connectivity Thermal Circuit Breaker - W58 Single Pole 250V ac Voltage Rating, 30A Current Rating
  • RS stock no. 782-8016
  • Mfr. Part No. W54-XB1A4A10-30
Each
R 120.44(exc. VAT)
In Stock
RS PRO Single Phase Industrial Surge Protector, 10kA, 1.1kV, DIN Rail Mount
  • RS stock no. 101-748
Each
R 568.50(exc. VAT)
Temporarily out of stock
Better World
Siemens, 0AA0 MCCB 3P 25A, Breaking Capacity 85 kA, Fixed Mount
  • RS stock no. 211-6051
  • Mfr. Part No. 3VA2025-6KP36-0AA0
Each
R 23,615.50(exc. VAT)
In Stock
Better World
Schneider Electric Auto Recloser for use with 2
  • RS stock no. 220-1209
  • Mfr. Part No. A9C70342
Each
R 12,936.00(exc. VAT)
In Stock
Eaton xEffect MCB, 3P, 15A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS stock no. 847-3279
  • Mfr. Part No. 278872 FAZ-C15/3
Each
R 2,175.89(exc. VAT)
In Stock
Schurter 1.5A T Ceramic Cartridge Fuse, 7 x 2mm
  • RS stock no. 269-3861
  • Mfr. Part No. 7010.9962.63
Each
R 11.46(exc. VAT)
In Stock
Legrand 6.3A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 266-3069
  • Mfr. Part No. 0 102 63
1 Box of 10
R 313.54(exc. VAT)
In Stock
RS PRO 6.3A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-396
Each (In a Pack of 10)
R 6.897(exc. VAT)
In Stock
Schneider Electric, ComPacT New Generation Circuit breaker 3P 100A, Breaking Capacity 36 kA, Fixed Mount
  • RS stock no. 254-6281
  • Mfr. Part No. C10F3
Each
R 5,365.04(exc. VAT)
In Stock
RS PRO 15A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS stock no. 188-4644
Each
R 182.81(exc. VAT)
In Stock
WJ Furse Lightning Earth Inspection Pit W. 300mm x 300mm H. 158mm 5000kg
  • RS stock no. 124-2510
  • Mfr. Part No. 7TCA083320R0011 PT205
Each
R 1,443.99(exc. VAT)
Results per page
1
7
2535

Related links