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

2278 / 999+
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Hi-Touch LSI, 3 channels
  • RS Stock No. 259-3161
  • Mfr. Part No. 1SDA071018R1
Each
MYR54,640.64
Temporarily out of stock
Siemens SENTRON 5SP3763 MCB, 1P, 63A, Type E
  • RS Stock No. 231-8358
  • Mfr. Part No. 5SP3763-3
Each
MYR631.22
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 55 kA
  • RS Stock No. 209-6921
  • Mfr. Part No. 3VA2125-5KP32-0AA0
Each
MYR6,416.93
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 5kA 1SDA07, 4 / f channels
  • RS Stock No. 259-3949
  • Mfr. Part No. 1SDA071993R1
Each
MYR249,135.40
In Stock
Better World
Siemens, SENTRON MCCB 4P 50A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 271-9357
  • Mfr. Part No. 3VA1150-4GD46-0AA0
Each
MYR2,450.18
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 4P 50A, Clip-On
  • RS Stock No. 178-7834
  • Mfr. Part No. LV426610
Each
MYR2,214.27
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 63A 3VA2, 4 channels
  • RS Stock No. 157-224
  • Mfr. Part No. 3VA2163-8HN46-0AA0
Each
MYR8,096.77
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-4373
  • Mfr. Part No. 1SDA072553R1
Each
MYR123,220.29
Temporarily out of stock
Siemens ALPHA Adapter Kit for use with ALPHA 400/630 DIN
  • RS Stock No. 210-1760
  • Mfr. Part No. 8GK4401-2KK22
Each
MYR740.27
In Stock
Bourns 40A Tag Fuse, 38mm, 170V dc, 24.1mm
  • RS Stock No. 254-4229
  • Mfr. Part No. PF-NT5-40
Each
MYR135.08
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 4 channels
  • RS Stock No. 259-3853
  • Mfr. Part No. 1SDA071865R1
Each
MYR140,064.07
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3777
  • Mfr. Part No. 3VA2040-7JP42-0AA0
Each
MYR10,567.26
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 63A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 271-9380
  • Mfr. Part No. 3VA1163-3GD46-0AA0
Each
MYR2,272.48
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-7509
  • Mfr. Part No. C10W46E100
Each
MYR18,615.16
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 3 channels
  • RS Stock No. 259-3024
  • Mfr. Part No. 1SDA070876R1
Each
MYR31,089.37
Temporarily out of stock
ABB Opening Solenoid for use with Tmax XT
  • RS Stock No. 237-6201
  • Mfr. Part No. 1SDA066993R1
Each
MYR2,399.63
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Touch LI, 4 channels
  • RS Stock No. 259-3517
  • Mfr. Part No. 1SDA071494R1
Each
MYR32,715.57
Temporarily out of stock
Eaton Eaton Moeller Enclosure for use with PKZM4
  • RS Stock No. 272-7251
  • Mfr. Part No. 113743 CI-K4-PKZ4-NA-GR
Each
MYR436.36
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 2.5kA Ekip G Touch LSIG, 3 channels
  • RS Stock No. 259-3240
  • Mfr. Part No. 1SDA071127R1
Each
MYR99,245.27
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip Dip LI, 4 channels
  • RS Stock No. 259-4676
  • Mfr. Part No. 1SDA072951R1
Each
MYR41,445.27
1
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