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

50973 Products showing for Fuses & Circuit Breakers

76 of 999+
Eaton 10A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7036
  • Mfr. Part No. MDA-10-R
Each
£1.14
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 20A Curve D, 100 → 133V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3477
  • Mfr. Part No. A9F55120
Each
£27.08
Eaton 10A gG/gL Cartridge Fuse, 14 x 51mm
  • RS Stock No. 229-108
  • Mfr. Part No. C14G10 CYLINDRICAL FUSE 14 x 51 10A gG 690V AC
1 Pack of 10
£13.72
Mersen 20A FF Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 136-0615
  • Mfr. Part No. E1014580 / FR10GR69V20
Each
£8.47
Better World
Siemens SENTRON 5SL4 MCB, 1+N, 4A Curve D, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 209-6521
  • Mfr. Part No. 5SL4504-8
Each
£61.79
Eaton 2A Grey Blade Car Fuse, 32V ac/dc
  • RS Stock No. 852-7317
  • Mfr. Part No. ATM-2
Each
£2.45
ABB S301 MCB, 1P, 4A Curve C, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 200-261
  • Mfr. Part No. 2CDS381001R0044
Each
£33.49
Mersen 2A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 136-0575
  • Mfr. Part No. V090546 / MI5ST25V2
Each (In a Pack of 10)
£0.453
ABB 16 Way Steel Consumer Unit, 100A, IP30 Housemaster
  • RS Stock No. 453-996
  • Mfr. Part No. 1SKB118142C6001
Each
£234.10
Littelfuse 0.5A Resettable Fuse, 24V dc
  • RS Stock No. 517-7111
  • Mfr. Part No. MINISMDC050F-2
Each (In a Pack of 10)
£0.33
Siemens 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P, 690V ac
  • RS Stock No. 203-2048
  • Mfr. Part No. 3NW7013
Each
£9.75
Littelfuse 60A Yellow BF1 Car Fuse, 32V dc
  • RS Stock No. 431-6719
  • Mfr. Part No. 153.5631.5601
Each (In a Pack of 5)
£3.214
Wickmann 1A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 174-0665
  • Mfr. Part No. 35611000029
Each (In a Pack of 5)
£2.034
TE Connectivity 30A Fuse Holder for 10 x 38mm Fuse, 3P, 600V
  • RS Stock No. 299-071
  • Mfr. Part No. 1SNF100027R0000
Each
£8.72
Eaton 40A Ceramic Cartridge Fuse, 23 x 57mm
  • RS Stock No. 182-1692
  • Mfr. Part No. 40KR85
Each
£7.37
Contactum RCBO, 40A Current Rating, 1P Poles, 30mA Trip Sensitivity, Type B, CCPBR Range
  • RS Stock No. 240-6389
  • Mfr. Part No. CCPBR0640AB
Each
£26.07
ABB Tmax XT Shunt Opening Release for use with Circuit Breaker
  • RS Stock No. 232-0173
  • Mfr. Part No. 1SDA066317R1 SOR XT1..4 220...240VAC/DC
Each
£88.20
Mersen 10A F GMG Cartridge Fuse, 10 x 38mm
  • RS Stock No. 914-4358
  • Mfr. Part No. ATM10
Each
£12.20
ABB System Pro M Compact S200 MCB, 2P, 4A Curve B, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 204-258
  • Mfr. Part No. 2CDS252001R0045
Each
£70.95
Littelfuse SMD Non Resettable Fuse 3A, 250V
  • RS Stock No. 895-1735
  • Mfr. Part No. 0476003.MR
Each (In a Pack of 10)
£1.022
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