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

3 of 999+
RS PRO Three Phase Industrial Surge Protector, 50kA, 1.5kV, DIN Rail Mount
  • RS Stock No. 101-741
Each
£138.11
Eaton xPole MCB, 1+N, 6A Curve C, 230V AC, 4.5 kA Breaking Capacity
  • RS Stock No. 230-1084
  • Mfr. Part No. 264743 PLG4-C6/1N
Each
£13.51
RS PRO Rail Mount Fuse Holder
  • RS Stock No. 501-871
Each
£9.65
Better World
Schneider Electric Busbar Tap-Off Unit with Circuit Breaker, Canalis KS Series
  • RS Stock No. 211-0513
  • Mfr. Part No. KSB63SM48
Each
£228.05
Eaton RCBO, 10A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, PXK Range
  • RS Stock No. 183-3543
  • Mfr. Part No. 236962 PXK-C10/1N/003-A
Each
£67.39
Littelfuse Automotive Fuse Kit
  • RS Stock No. 219-9562
  • Mfr. Part No. 00950011XXN
Each
£45.47
RS PRO 20A Solid Link for A1 Fuses
  • RS Stock No. 242-1049
Each (In a Pack of 5)
£2.764
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
Europa EUR1 RCCB, 25A, 2 Pole, 30mA, Type A, 230V ac
  • RS Stock No. 210-4747
  • Mfr. Part No. EUR125.30/2A
Each
£41.50
Eaton 32A British Standard Fuse, A2, 660V ac, 73mm
  • RS Stock No. 415-193
  • Mfr. Part No. TIA32M40
Each (In a Pack of 5)
£11.818
Phoenix Contact Surge Protector, 6kA
  • RS Stock No. 241-6056
  • Mfr. Part No. 2800491
Each
£268.56
Eaton 125A British Standard Fuse, A4, 415V ac, 94mm
  • RS Stock No. 139-956
  • Mfr. Part No. DEO125
Each
£24.90
Eaton 20A British Standard Fuse, A1, 550V ac, 44.5mm
  • RS Stock No. 413-311
  • Mfr. Part No. NITD20
1 Pack of 5
£22.27
RS PRO MCB, 3P, 32A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0208
Each
£29.93
RS PRO MCB, 3P, 10A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0205
Each
£28.37
Littelfuse 210A Base Mount Fuse Holder for ATO Fuse
  • RS Stock No. 894-9622
  • Mfr. Part No. PDM61001ZXM
Each
£22.70
RS PRO MCB, 1P, 16A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0197
Each
£8.57
RS PRO MCB, 1P, 3A Curve C, 240 → 415V AC, 6 kA Breaking Capacity
  • RS Stock No. 265-0191
Each
£8.57
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
ABB PS4 4 Phase Busbar, 230 → 400V, 17.5mm Pitch
  • RS Stock No. 225-5982
  • Mfr. Part No. 2CDL240101R1612 PS4/12/16
Each
£23.10
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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
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