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

2304 / 999+
Siemens SENTRON Wire Connector for use with 3VA52 250
  • RS Stock No. 269-7162
  • Mfr. Part No. 3VA9253-0JG12
Each (In a Pack of 3)
MYR70.943
Schneider Electric, ComPacT MCCB 3P 50A, Fixed Mount
  • RS Stock No. 260-9531
  • Mfr. Part No. C10R3MA050
Each
MYR5,256.24
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 3 channels
  • RS Stock No. 259-4398
  • Mfr. Part No. 1SDA072580R1
Each
MYR163,921.91
Schneider Electric, ComPacT MCCB 4P 160A, Fixed Mount
  • RS Stock No. 260-7977
  • Mfr. Part No. C25R42D160
Each
MYR16,046.83
ABB SMISSLINE TP MCB, 2P, 2A Curve C, 440V AC
  • RS Stock No. 246-2462
  • Mfr. Part No. 2CCS562001R1024
Each
MYR932.28
Lovato Single Phase Surge Protector, 100kA, DIN Rail Mount
  • RS Stock No. 248-5665
  • Mfr. Part No. SA1B3PA320R
Each
MYR4,227.60
Siemens SENTRON Connecting Terminals for use with 3VA2 100/160/250
  • RS Stock No. 210-9315
  • Mfr. Part No. 3VA9204-0QE00
Each
MYR620.68
Better World
ABB Emax2 Electronic Circuit Breaker 800A Ekip Hi-Touch LSI, 3 channels
  • RS Stock No. 259-3042
  • Mfr. Part No. 1SDA070898R1
Each
MYR46,556.00
Better World
ABB Emax2 Electronic Circuit Breaker 4kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-3294
  • Mfr. Part No. 1SDA071203R1
Each
MYR108,909.68
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 2.5 kA, Fixed Mount
  • RS Stock No. 270-4740
  • Mfr. Part No. 3VA2163-7HM32-0AA0
Each
MYR6,141.50
Siemens, SENTRON MCCB 4P 800A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 272-0193
  • Mfr. Part No. 3VA1580-7EF42-0AA0
Each
MYR21,780.10
Better World
Siemens SENTRON 5SY6 MCB, 1+N, 13A Curve B, 230V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 209-7529
  • Mfr. Part No. 5SY6513-6
Each
MYR283.78
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4609
  • Mfr. Part No. 3VA2140-0KQ32-0AA0
Each
MYR10,838.79
ABB Emax2 Electronic Circuit Breaker 1.25kA 1SDA07, 3 channels
  • RS Stock No. 259-4095
  • Mfr. Part No. 1SDA072190R1
Each
MYR42,281.53
Siemens 10A Cartridge Fuse, 14 x 51mm
  • RS Stock No. 397-373
  • Mfr. Part No. 3NC1410
Each (In a Pack of 10)
MYR114.701
Better World
ABB Emax2 Electronic Circuit Breaker 4kA Ekip Dip LI, 3 channels
  • RS Stock No. 259-3292
  • Mfr. Part No. 1SDA071201R1
Each
MYR103,984.54
Better World
Siemens, SENTRON MCCB 4P 20A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 211-3721
  • Mfr. Part No. 3VA1120-4EE42-0AA0
Each
MYR2,455.23
Better World
Siemens 5SV3621 RCCB, 16A, 2 Pole, 300mA, Type B, 230V ac
  • RS Stock No. 231-8382
  • Mfr. Part No. 5SV3621-4
Each
MYR2,625.43
Bourns Surface Mount Fuse 2A, 50 V dc, 63 V dc
  • RS Stock No. 245-9201
  • Mfr. Part No. SF-0603SPA200R-2
Each
MYR5.52
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3799
  • Mfr. Part No. 3VA2040-8HM42-0AA0
Each
MYR7,785.94
1
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