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

46578 Products showing for Fuses & Circuit Breakers

162 / 999+
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 40A Curve C, 220 → 240V AC, 24V DC, 10 kA Breaking Capacity
  • RS Stock No. 790-7361
  • Mfr. Part No. A9C65340
Each
MYR2,894.01
Eaton 3A Cartridge Fuse, 195 x 25.4mm
  • RS Stock No. 247-617
  • Mfr. Part No. 12OBCNA3
1 Pack of 12
MYR11,189.89
ABB System Pro M Compact S200L MCB, 1P, 16A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 183-3626
  • Mfr. Part No. 2CDS241701R0164
Each
MYR125.07
ABB Emax2 Electronic Circuit Breaker 6.3kA Ekip Hi-Touch LSI, 3 channels
  • RS Stock No. 259-3386
  • Mfr. Part No. 1SDA071309R1
Each
MYR290,487.47
Siemens SENTRON Nut Keeper Kit for use with 3VA51
  • RS Stock No. 269-7105
  • Mfr. Part No. 3VA9134-0QA00
Each (In a Pack of 4)
MYR43.725
Better World
Siemens, SENTRON MCCB 3P 600A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 249-746
  • Mfr. Part No. 3VA6460-8HL31-0AA0
Each
MYR23,574.01
ABB Emax2 Electronic Circuit Breaker 3.2kA Ekip Hi-Touch LSI, 3 channels
  • RS Stock No. 259-4360
  • Mfr. Part No. 1SDA072529R1
Each
MYR132,605.76
Better World
Siemens SENTRON Electronic Circuit Breaker 250A 3VA2, 3 channels Type N
  • RS Stock No. 156-665
  • Mfr. Part No. 3VA2325-0HL32-0AA0
Each
MYR15,378.41
Schurter TA11 Thermal Circuit Breaker - T11-211 Single Pole 240V ac Voltage Rating Universal Mount, 6A Current Rating
  • RS Stock No. 269-3820
  • Mfr. Part No. 4400.0050
Each
MYR43.69
Bourns 0.05A Resettable Fuse, 220V
  • RS Stock No. 692-6771
  • Mfr. Part No. CMF-RL50A-0
Each (In a Pack of 5)
MYR3.144
Schneider Electric Resi9 1 Phase Busbar, 230V ac, 18mm Pitch
  • RS Stock No. 211-975
  • Mfr. Part No. R9XFH112
Each
MYR39.58
Eaton Eaton Moeller NZM Door Coupling Handle for use with N(S)1, NZM1
  • RS Stock No. 240-430
  • Mfr. Part No. 100683 NZM1-XTVDV-NA
Each
MYR581.20
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 600A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 249-453
  • Mfr. Part No. 3VA6560-6KT36-2AA0
Each
MYR35,523.97
Better World
Siemens Sentron 5SY4 MCB, 3P, 50A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 124-3180
  • Mfr. Part No. 5SY4350-7
Each
MYR596.54
ABB System Pro M Compact S200M MCB, 3+N, 20A Curve B, 400V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 200-794
  • Mfr. Part No. 2CDS273103R0205
Each
MYR2,299.22
Schneider Electric, ComPacT MCCB 3P 1.25kA, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 654-142
  • Mfr. Part No. C125N350FM
Each
MYR30,927.62
Eaton 90A Bolted Tag Fuse, 500 V dc, 690V ac, 70mm
  • RS Stock No. 182-1755
  • Mfr. Part No. 90EET
Each
MYR153.66
Siemens SENTRON Wire Connector for use with 3VA2 100/160/250
  • RS Stock No. 210-9361
  • Mfr. Part No. 3VA9263-0QC00
Each
MYR479.18
Schneider Electric, ComPacT MCCB 3P 50A, Fixed Mount
  • RS Stock No. 260-7592
  • Mfr. Part No. C11F3TM050B
Each
MYR2,635.86
Better World
Schneider Electric Multi 9 C60SP MCB, 3P, 20A Curve B, 440V AC, 15 kA Breaking Capacity
  • RS Stock No. 211-2344
  • Mfr. Part No. M9F21320
Each
MYR617.48
1
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