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

50820 Products showing for Fuses & Circuit Breakers

2 of 999+
In Stock
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(exc. VAT)
In Stock
Eaton 2A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 489-4405
  • Mfr. Part No. C10G2
1 Pack of 10
£11.12(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 16A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3382
  • Mfr. Part No. A9F54316
Each
£106.92(exc. VAT)
In Stock
Legrand 4115 RCD, 80A, 1+N Pole, 30mA, Type AC
  • RS Stock No. 863-7776
  • Mfr. Part No. 4 115 07
Each
£71.28(exc. VAT)
Being discontinued
RS PRO 6.3A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-425
1 Pack of 10
£2.85(exc. VAT)
In Stock
Allen Bradley 1492-SP 1492-SPM MCB, 2P, 5A Curve C
  • RS Stock No. 218-8795
  • Mfr. Part No. 1492-SPM2C050
Each
£44.09(exc. VAT)
In Stock
Eaton 10A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 703-8386
  • Mfr. Part No. C10G10
1 Pack of 10
£11.01(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 2A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3326
  • Mfr. Part No. A9F54202
Each
£92.21(exc. VAT)
In Stock
Better World
Schneider Electric Multi 9 MCB, 1P, 16A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 219-9120
  • Mfr. Part No. M9F22116
Each
£28.01(exc. VAT)
In Stock
Better World
Schneider Electric Busbar Tap-Off Unit with Circuit Breaker, Canalis Series
  • RS Stock No. 406-344
  • Mfr. Part No. KNB32CM55
Each
£91.39(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 4A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3338
  • Mfr. Part No. A9F54204
Each
£86.87(exc. VAT)
Being discontinued
RS PRO 500mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-633
1 Pack of 10
£2.85(exc. VAT)
In Stock
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(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 10A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3341
  • Mfr. Part No. A9F54210
Each
£73.51(exc. VAT)
In Stock
Schurter LBC Fuse Kit
  • RS Stock No. 167-9219
  • Mfr. Part No. 7189.0009
Each
£179.56(exc. VAT)
In Stock
RS PRO 20A British Standard Fuse, A1, 550V ac, 44.5mm
  • RS Stock No. 521-2523
1 Pack of 5
£20.34(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 16A Curve B, 100 → 133V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3164
  • Mfr. Part No. A9F53116
Each
£24.45(exc. VAT)
In Stock
RS PRO MCB, 2P, 2A Curve C, 240 → 415V AC, 6 kA Breaking Capacity
  • RS Stock No. 265-0175
Each
£19.09(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 40A Curve D, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3578
  • Mfr. Part No. A9F55340
Each
£122.98(exc. VAT)
In Stock
Eaton xEffect MCB, 1P, 1.5A Curve B
  • RS Stock No. 230-0862
  • Mfr. Part No. 177374 FAZ6-B1,5/1
Each
£19.76(exc. VAT)
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