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

50957 Products showing for Fuses & Circuit Breakers

92 of 999+
Better World
Schneider Electric TeSys Thermal Circuit Breaker - TeSyS GV 3 Pole 690V Voltage Rating DIN Rail Mount, 25A Current
  • RS Stock No. 272-814
  • Mfr. Part No. GV3L25
Each
£171.73
ABB RCBO, 32A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type B, System Pro M Compact Range
  • RS Stock No. 914-4070
  • Mfr. Part No. 2CSR255051R1325 DSE201 B32 AC30 - N Blue
Each
£64.90
Schneider Electric RCBO, 16A Current Rating, 1P Poles, Type C, Acti9 Range
  • RS Stock No. 245-022
  • Mfr. Part No. A9D05816
Each
£155.78
Mersen 5A T Fibreglass Cartridge Fuse, 10 x 38mm
  • RS Stock No. 914-4339
  • Mfr. Part No. ATDR5
Each
£22.10
Better World
Schneider Electric 250V ac Push Button Push Button
  • RS Stock No. 790-9184
  • Mfr. Part No. A9E18036
Each
£30.69
Mersen 20A F GMG Cartridge Fuse, 10 x 38mm
  • RS Stock No. 914-4360
  • Mfr. Part No. ATM20
Each
£12.20
Mersen 25A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 230-3480
  • Mfr. Part No. E213099
Each (In a Pack of 10)
£1.385
Better World
Siemens RCBO, 13A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type C, SENTRON Range
  • RS Stock No. 187-3288
  • Mfr. Part No. 5SV1316-7KK13
Each
£129.08
Better World
Schneider Electric RCBO, 32A Current Rating, 2P Poles, 30mA Trip Sensitivity, Acti 9 Range
  • RS Stock No. 790-9263
  • Mfr. Part No. A9D11232
Each
£241.88
Better World
Schneider Electric Acti 9 C120H MCB, 4P, 100A Curve D
  • RS Stock No. 248-3683
  • Mfr. Part No. A9N18524
Each
£483.50
Mersen 4A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 188-7038
  • Mfr. Part No. W219232
1 Pack of 10
£13.85
Eaton xEffect MCB, 2P, 1A Curve C, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4520
  • Mfr. Part No. 239096 FAZ6-C1/2
Each
£72.68
Socomec 50A Cartridge Fuse, 14 x 51mm
  • RS Stock No. 122-5277
  • Mfr. Part No. 60220050
Each (In a Pack of 10)
£1.529
Eaton 63A British Standard Fuse, F2, 415V ac
  • RS Stock No. 122-9606
  • Mfr. Part No. ESD63
Each (In a Pack of 5)
£2.906
Littelfuse 2A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 541-3029
  • Mfr. Part No. 0313002.MXP
Each (In a Pack of 10)
£0.906
Better World
Schneider Electric RCBO, 20A Current Rating, 1P+N Poles, Type AB, Easy9 Range
  • RS Stock No. 850-8656
  • Mfr. Part No. EZ9D16820
Each
£28.84
Contactum MCB, 3P, 32A Curve D, 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 184-9045
  • Mfr. Part No. CPB1032D3
Each
£14.68
Schurter 1A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 789-7797
  • Mfr. Part No. 0001.2504
Each (In a Bag of 10)
£0.536
Littelfuse 12A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 738-2832
  • Mfr. Part No. 0215012.TXP
Each (In a Pack of 10)
£1.474
RS PRO 25A Natural Blade Car Fuse, 32V dc
  • RS Stock No. 563-794
Each (In a Pack of 10)
£0.377
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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
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MCBs Guide
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