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

150 of 999+
Littelfuse 10A Panel Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 769-0152
  • Mfr. Part No. 03455LF1H
Each (In a Pack of 5)
£4.668
Socomec 8A F Cartridge Fuse, 10 x 38mm
  • RS Stock No. 223-2792
  • Mfr. Part No. 60130008
Each (In a Pack of 10)
£0.869
Mersen 125mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 270-3006
  • Mfr. Part No. B090506
Each (In a Box of 10)
£0.705
Better World
Schneider Electric Acti 9 iC60N MCB, 1P, 25A Curve C, 100 → 133V AC, 12 → 48V DC, 6 kA Breaking Capacity
  • RS Stock No. 790-8869
  • Mfr. Part No. A9F44125
Each
£27.49
Mersen 2A F GMG Cartridge Fuse, 10 x 38mm
  • RS Stock No. 914-4348
  • Mfr. Part No. ATM2
Each
£12.20
Better World
Siemens RCBO, 10A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type B, Sentron Range
  • RS Stock No. 150-4176
  • Mfr. Part No. 5SU1354-6KK10
Each
£135.55
Socomec 250A NH Fuse, NH1, 500V
  • RS Stock No. 252-5342
  • Mfr. Part No. 67120250
Each (In a Pack of 3)
£19.34
Eaton Eaton Moeller NZM Door Coupling Handle for use with N4, NZM4
  • RS Stock No. 257-006
  • Mfr. Part No. 271448 NZM4-XTVD-NA
Each
£243.20
Mersen 8A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 247-2725
  • Mfr. Part No. D217169
1 Box of 10
£13.85
Schneider Electric, ComPacT MCCB 3P 400A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 260-8125
  • Mfr. Part No. C40N32D400
Each
£2,616.93
Better World
Schneider Electric, Compact MCCB 3P 160A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 178-8214
  • Mfr. Part No. LV426359
Each
£399.98
Eaton 50A British Standard Fuse, A4, 500V, 94mm
  • RS Stock No. 181-8504
  • Mfr. Part No. CEO50
Each (In a Box of 10)
£7.125
Mersen 0.1 → 6.3A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 247-2757
  • Mfr. Part No. G203763
1 Box of 1
£177.91
Bourns 0.2A Resettable Fuse, 30V
  • RS Stock No. 647-8370
  • Mfr. Part No. MF-USMF020-2
Each (In a Pack of 10)
£0.233
Eaton xEffect MCB, 2P, 12A Curve C
  • RS Stock No. 230-0954
  • Mfr. Part No. 177561 FAZ6-C12/2
Each
£33.98
ABB S303 MCB, 3P, 32A Curve C, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 201-347
  • Mfr. Part No. 2CDS383001R0324
Each
£116.59
Schneider Electric, ComPacT Circuit Breaker Accessory 1P
  • RS Stock No. 288-1501
  • Mfr. Part No. LV438320
Each
£20.80
Eaton 25A gG/gL Cartridge Fuse, 10 x 38mm
  • RS Stock No. 229-266
  • Mfr. Part No. C10G25 CYLINDRICAL FUSE 10 x 38 25A GG 500V AC
1 Pack of 10
£6.85
Lovato ModuLo P1MB MCB, 1P, 10A Curve C, 230V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 825-5598
  • Mfr. Part No. P1MB1PC10
Each
£16.72
Phoenix Contact Electronic Device Circuit Breaker Electronic Circuit breaker 2A 24V CB, 1 channels
  • RS Stock No. 212-8806
  • Mfr. Part No. 2800923
Each
£41.32
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MCBs Guide
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