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

50830 Products showing for Fuses & Circuit Breakers

1 of 999+
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RS PRO MCB, 3P, 32A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0208
Each
£29.93(exc. VAT)
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RS PRO MCB, 1P, 6A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0204
Each
£8.57(exc. VAT)
In Stock
RS PRO MCB, 1P, 2A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0198
Each
£8.57(exc. VAT)
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Schneider Electric Acti9 1 Phase Distribution Board, 6 Way, 125 A
  • RS Stock No. 244-967
  • Mfr. Part No. SE125A6
Each
£111.96(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 63A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3405
  • Mfr. Part No. A9F54363
Each
£140.31(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 6A Curve C, 100 → 133V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3290
  • Mfr. Part No. A9F54106
Each
£27.19(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 6A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3332
  • Mfr. Part No. A9F54206
Each
£80.18(exc. VAT)
In Stock
Littelfuse Automotive Fuse Kit
  • RS Stock No. 219-9556
  • Mfr. Part No. 00940957XXN
Each
£45.04(exc. VAT)
In Stock
Rittal Earth Bar L. 450mm x W. 15mm x H. 5mm
  • RS Stock No. 826-2868
  • Mfr. Part No. 7113000
Each
£36.33(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 32A Curve D, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3574
  • Mfr. Part No. A9F55332
Each
£112.28(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 10A Curve C, 100 → 133V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3293
  • Mfr. Part No. A9F54110
Each
£24.20(exc. VAT)
In Stock
RS PRO Rail Mount Fuse Holder
  • RS Stock No. 501-871
Each
£9.65(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 16A Curve C, 100 → 133V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3297
  • Mfr. Part No. A9F54116
Each
£24.20(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
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 25A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3394
  • Mfr. Part No. A9F54325
Each
£108.27(exc. VAT)
In Stock
Schneider Electric Acti9 A9F0 MCB, 1P, 6A Curve C, 230V AC, 72V DC, 15 kA Breaking Capacity
  • RS Stock No. 212-248
  • Mfr. Part No. A9F07106
Each
£19.21(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
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
RS PRO Earthing Strap Metal 12 → 32mm Diameter
  • RS Stock No. 390-2448
1 Pack of 10
£17.38(exc. VAT)
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