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

51028 Products showing for Fuses & Circuit Breakers

9 of 999+
Allen Bradley 1492-SP 1492-SPM MCB, 1P+N, 2A Curve C
  • RS Stock No. 218-8730
  • Mfr. Part No. 1492-SPM1C020-N
Each
£42.96(exc. VAT)
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 10A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3388
  • Mfr. Part No. A9F54310
Each
£106.92(exc. VAT)
RS PRO 3A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 668-5963
1 Pack of 10
£3.17(exc. VAT)
nVent ERIFLEX ERIFLEX Busbar
  • RS Stock No. 277-6178
  • Mfr. Part No. 568662
Each
£24.23(exc. VAT)
Better World
Schneider Electric RCBO, 20A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti 9 Range
  • RS Stock No. 790-9305
  • Mfr. Part No. A9D11820
Each
£148.47(exc. VAT)
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 10A Curve D, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3565
  • Mfr. Part No. A9F55310
Each
£113.61(exc. VAT)
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)
Europa EUC2P EUC MCB, 2P, 10A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6547
  • Mfr. Part No. EUC2P10C
Each
£15.36(exc. VAT)
Eaton 10A F Ceramic Cartridge Fuse, 6.3 x 25mm
  • RS Stock No. 412-598
  • Mfr. Part No. TDC180-10A
Each (In a Pack of 10)
£0.52(exc. VAT)
Eaton xEffect MCB, 1P, 16A Curve C, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4560
  • Mfr. Part No. 239037 FAZ6-C16/1
Each
£20.67(exc. VAT)
NEMIQ Earthing Strap Copper
  • RS Stock No. 288-4615
  • Mfr. Part No. JF 16-250 M10
Each
£6.19(exc. VAT)
RS PRO MCB, 2P, 10A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0179
Each
£18.94(exc. VAT)
Bourns 225A Tag Fuse, 66mm, 800V ac/dc, 24.1mm
  • RS Stock No. 254-4120
  • Mfr. Part No. PF-FB1-225
Each
£143.87(exc. VAT)
Schneider Electric RCBO, 16A Current Rating, 1P Poles, Type C, Acti9 Range
  • RS Stock No. 245-022
  • Mfr. Part No. A9D05816
Each
£155.78(exc. VAT)
Schneider Electric Acti9 SE10 MCB Mini Circuit Breaker, 1P, 16A Curve C, 415V AC, 10000 A Breaking Capacity
  • RS Stock No. 339-307
  • Mfr. Part No. SE10C116
Each
£23.23(exc. VAT)
Eaton 63A British Standard Fuse, A3, 660V ac, 73mm
  • RS Stock No. 415-222
  • Mfr. Part No. TIS63
Each
£18.49(exc. VAT)
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)
Europa EUC1P EUC MCB, 1P, 6A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6500
  • Mfr. Part No. EUC1P6C
Each
£6.92(exc. VAT)
Schurter Non-Resettable Fuse Kit
  • RS Stock No. 122-3333
  • Mfr. Part No. 0034.9857
Each
£106.54(exc. VAT)
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)
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RCBOs Guide
There are many things to consider when choosing the right RCBO. Find out more in our comprehensive RCBOs guide.
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Fuses Guide
Our fuses guide explains what they are, what they are used for, how they work, and the different types available.
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Distribution Boards Guide
Our distribution boards guide explains what they are, their uses and types, and how to connect distribution boards.
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MCBs Guide
What are MCBs and how do they work? Discover all you need to know in our comprehensive guide.
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