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

50816 Products showing for Fuses & Circuit Breakers

1 of 999+
In Stock
RS PRO 30A Rail Mount Fuse Holder for 5 x 20mm Fuse, 1P, 500V
  • RS Stock No. 242-0497
1 Bag of 10
£30.42(exc. VAT)
In Stock
WISKA Earthing Nut
  • RS Stock No. 700-0818
  • Mfr. Part No. EN20
1 Pack of 6
£25.00(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, 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 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
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
£221.33(exc. VAT)
In Stock
Schneider Electric Enclosure
  • RS Stock No. 466-0527
  • Mfr. Part No. 13441
Each
£84.16(exc. VAT)
In Stock
RS PRO 16A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 209-9311
1 Pack of 10
£11.71(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)
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
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 110V ac/dc Remote Tripping Device Circuit Trip for use with LR3D Series, LRD Series
  • RS Stock No. 744-6973
  • Mfr. Part No. LAD703F
Each
£71.70(exc. VAT)
In Stock
Better World
ABB Compact Home SH200 MCB, 3P, 6A Curve C, 440V AC, 6 kA Breaking Capacity
  • RS Stock No. 539-8330
  • Mfr. Part No. 2CDS213001R0064 SH203-C6
Each
£56.87(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)
In Stock
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
Eaton 125A British Standard Fuse, B2, 415V ac, 111mm
  • RS Stock No. 156-8686
  • Mfr. Part No. DD125
Each
£22.51(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 Acti 9 iC60H MCB, 3P, 50A Curve D, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3587
  • Mfr. Part No. A9F55350
Each
£145.65(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 3A Curve B, 100 → 133V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3155
  • Mfr. Part No. A9F53103
Each
£34.27(exc. VAT)
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