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

46580 Products showing for Fuses & Circuit Breakers

22 / 999+
Wickmann 15A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 174-0639
  • Mfr. Part No. 0314015.MXP
Each (In a Pack of 10)
MYR3.534
Littelfuse 8A Resettable Fuse, 30V dc
  • RS Stock No. 517-6887
  • Mfr. Part No. RUEF800
Each (In a Pack of 10)
MYR3.752
Eaton PXF-A RCCB, 40A, 3+N Pole, 30mA, Type A, 400V ac
  • RS Stock No. 490-466
  • Mfr. Part No. 236776 PXF-40/4/003-A
Each
MYR306.80
Better World
Siemens SENTRON 5SY5 MCB, 1P, 3A Curve C, 400V AC, 220V DC, 10 kA Breaking Capacity
  • RS Stock No. 209-6671
  • Mfr. Part No. 5SY5103-7
Each
MYR325.84
Mersen 25A D02 Neozed Fuse, gG, 400V ac
  • RS Stock No. 377-0279
  • Mfr. Part No. W213160
Each (In a Pack of 5)
MYR9.656
Mersen 20A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 247-2942
  • Mfr. Part No. X211551
1 Box of 10
MYR210.43
Better World
Schneider Electric Multi 9 C60SP MCB, 1P, 1A Curve C, 415V AC, 60V DC, 20 kA Breaking Capacity
  • RS Stock No. 211-2354
  • Mfr. Part No. M9F22101
Each
MYR91.80
Eaton RCCB, 40A, 2 Pole, 100mA, Type AC, 230V ac
  • RS Stock No. 227-0714
  • Mfr. Part No. 264281 PFGM-40/2/01
Each
MYR1,195.11
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 50A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3401
  • Mfr. Part No. A9F54350
Each
MYR919.46
Better World
Schneider Electric Acti 9 iC60N MCB, 2P, 2A Curve D, 400V AC, 12 → 144V DC, 6 kA Breaking Capacity
  • RS Stock No. 734-9646
  • Mfr. Part No. A9F75202
Each
MYR486.65
Better World
Schneider Electric iC60 RCD, 25A, 4 Pole, 300mA, Type AC
  • RS Stock No. 734-9191
  • Mfr. Part No. A9Q14425
Each
MYR1,641.36
ETA Thermal Circuit Breaker - 104-PR Single Pole 240V Voltage Rating PCB Mount, 1.5A Current Rating
  • RS Stock No. 728-8604
  • Mfr. Part No. 104-PR-1.5A
Each
MYR85.66
Eaton xEffect MCB, 3+N, 16A Curve C, 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 230-0962
  • Mfr. Part No. 239173 FAZ6-C16/3N
Each
MYR225.97
Eaton xEffect MCB, 1P, 2A Curve C, 240 → 415V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 922-6882
  • Mfr. Part No. 102080 FAZ-C2/1-NA
Each
MYR269.71
Schneider Electric Multi9 M9F MCB, 2P, 32A Curve D, 240V AC, 125V DC, 20 kA Breaking Capacity
  • RS Stock No. 288-1397
  • Mfr. Part No. M9F12232
Each
MYR930.84
RS PRO 4A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 668-6041
Each (In a Pack of 10)
MYR1.826
Eaton xEffect MCB, 2P, 20A Curve B, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4413
  • Mfr. Part No. 239089 FAZ6-B20/2
Each
MYR419.69
Littelfuse 250mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4319
  • Mfr. Part No. 0217.250MXP
Each (In a Pack of 10)
MYR4.613
Better World
Schneider Electric, ComPact MCCB, Fixed Mount
  • RS Stock No. 221-0938
  • Mfr. Part No. LV429388
Each
MYR716.17
Littelfuse PC Board Non Resettable Fuse, Radial 2A, 125V ac/dc
  • RS Stock No. 878-3264
  • Mfr. Part No. 0273002.H
Each
MYR32.37
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