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

50958 Products showing for Fuses & Circuit Breakers

151 of 999+
WAGO Electronic Circuit Breaker 8A 24V 787, 1 channels , DIN Rail
  • RS Stock No. 279-4126
  • Mfr. Part No. 787-2861/108-020
Each
£58.01
Better World
Schneider Electric RCBO, 32A Current Rating, 3P+N Poles, 300mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 238-3353
  • Mfr. Part No. A9DV7732
Each
£387.78
Eaton 32A Bolted Tag Fuse, F2, 550V ac
  • RS Stock No. 181-8639
  • Mfr. Part No. ESD32
Each
£6.02
Better World
Schneider Electric Acti 9 iC60H MCB, 4P, 16A Curve D, 12 → 133V AC, 220 → 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 790-8721
  • Mfr. Part No. A9F55416
Each
£192.46
Eaton 100A Offset Tag Fuse, 440V ac
  • RS Stock No. 182-1643
  • Mfr. Part No. XS100
Each
£69.10
Littelfuse 80mA F Ceramic Cartridge Fuse, 3 x 8.4mm
  • RS Stock No. 738-3122
  • Mfr. Part No. 0242.080UAT1
Each
£4.42
Better World
Siemens Sentron 5SY4 MCB, 1+N, 6A Curve B, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1410
  • Mfr. Part No. 5SY4506-6
Each
£59.16
Eaton 6A Bolted Tag Fuse, 240V ac, 35mm
  • RS Stock No. 181-8454
  • Mfr. Part No. STD6
1 Box of 20
£50.97
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 40A Curve B, 100 → 133V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3174
  • Mfr. Part No. A9F53140
Each
£28.60
Eaton 4A Slow-Blow Cartridge Fuse, 14 x 51mm
  • RS Stock No. 229-114
  • Mfr. Part No. C14M4 CYLINDRICAL FUSE 14 x 51 4A AM 690V AC
1 Pack of 10
£14.34
Legrand 6A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 180-6116
  • Mfr. Part No. 0 133 06
Each (In a Box of 10)
£1.833
Eaton xEffect MCB, 1P, 63A Curve D, 230V AC, 60V DC, 20 kA Breaking Capacity
  • RS Stock No. 251-366
  • Mfr. Part No. 211818 AZ-D63
Each
£150.51
Mersen 63A Ceramic Cartridge Fuse, 22 x 58mm
  • RS Stock No. 188-7505
  • Mfr. Part No. C215650
Each (In a Pack of 10)
£4.745
Hager NRN MCB, 3P, 25A Curve C, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 597-946
  • Mfr. Part No. NRN325
Each
£189.34
Allen Bradley 140MT Undervoltage Release for use with Motor Protection Circuit Breakers
  • RS Stock No. 273-2318
  • Mfr. Part No. 140MT-C-UXN
Each
£34.64
RS PRO 20A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 180-090
1 Pack of 10
£257.29
RS PRO PC Board Non Resettable Fuse, Radial 500mA, 250V
  • RS Stock No. 767-5184
Each (In a Pack of 10)
£0.439
Littelfuse 1A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 769-0120
  • Mfr. Part No. 0312001.HXP
Each (In a Pack of 10)
£0.328
Better World
ABB S200C MCB, 2P, 10A Curve C, 415V AC, 6 kA Breaking Capacity
  • RS Stock No. 212-1621
  • Mfr. Part No. 2CDS252280R0104
Each
£40.04
Littelfuse 50A Red BF1 Car Fuse, 32V dc
  • RS Stock No. 431-6703
  • Mfr. Part No. 153.5631.5501
Each (In a Pack of 5)
£3.32
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MCBs Guide
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