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

297 / 999+
Temporarily out of stock
Siemens SENTRON Connection Unit
  • RS Stock No. 277-0711
  • Mfr. Part No. 3WA9111-0AB04
Each
MYR434.19
Temporarily out of stock
SENTRON Busbar Connector for use with 3VA57/58, 3VA67/68 Series
  • RS Stock No. 263-562
  • Mfr. Part No. 3VA9873-0QB00
1 Kit
MYR9,016.79
Temporarily out of stock
Siemens, SENTRON MCCB 3P 800A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-4858
  • Mfr. Part No. 3VA2580-7HL32-0AA0
Each
MYR17,817.58
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 2.5kA Ekip G Hi-Touch LSIG, 3 channels
  • RS Stock No. 259-3211
  • Mfr. Part No. 1SDA071080R1
Each
MYR82,704.55
In Stock
Eaton 10A T Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 848-3891
  • Mfr. Part No. FNM-10
Each
MYR138.93
In Stock
Schurter SMD Non Resettable Fuse 10A, 63V ac/dc
  • RS Stock No. 782-3721
  • Mfr. Part No. 3402.0040.11
Each (In a Pack of 10)
MYR3.591
In Stock
Mersen 10A DI Diazed Fuse, E16 Thread Size, gG, 500V
  • RS Stock No. 377-0386
  • Mfr. Part No. B214062
Each (In a Pack of 5)
MYR22.838
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 1P, 40A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 209-6461
  • Mfr. Part No. 5SL4140-8
Each
MYR277.78
Temporarily out of stock
Eaton xEffect FAZ MCB, 1P, 1A Curve B, 240V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 245-839
  • Mfr. Part No. 132414 FAZ-B1/1-NA
1 Pack of 2
MYR261.20
In Stock
Better World
ABB, XT4S MCCB 3P 225A, Fixed Mount
  • RS Stock No. 236-6682
  • Mfr. Part No. 1SDA068311R1 XT4S 250 TMA 225A FF
Each
MYR4,850.75
Temporarily out of stock
ABB RCBO, 40A Current Rating, 3P Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 767-4434
  • Mfr. Part No. 2CSR273001R1405 DS203 M AC-B40/0,03
Each
MYR1,147.08
Temporarily out of stock
Bourns 12A F Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 254-4178
  • Mfr. Part No. PF-HT1-12
Each (In a Box of 50)
MYR102.029
Temporarily out of stock
Siemens ALPHA Feeder Terminal for use with N Busbar
  • RS Stock No. 203-8702
  • Mfr. Part No. 8WA2867
Each (In a Pack of 50)
MYR3.818
Temporarily out of stock
Eaton 2A Tag Fuse, 14 x 67mm, 550V
  • RS Stock No. 228-795
  • Mfr. Part No. ESD2
1 Pack of 20
MYR1,552.71
In Stock
Better World
Schneider Electric Busbar Trunking Fixing Bracket, Canalis KNB Series
  • RS Stock No. 248-4074
  • Mfr. Part No. KNB160ZF1
Each (In a Pack of 10)
MYR38.219
Temporarily out of stock
Socomec 500A NH Fuse, 4, 500V
  • RS Stock No. 252-5349
  • Mfr. Part No. 67460500
Each
MYR983.70
In Stock
Eaton xEffect MCB, 3+N, 3A Curve B
  • RS Stock No. 230-0906
  • Mfr. Part No. 177451 FAZ6-B3/3N
Each
MYR444.84
In Stock
Mersen 63A NH Fuse, NH000, 400V ac
  • RS Stock No. 270-3074
  • Mfr. Part No. L223685
Each (In a Box of 3)
MYR49.107
Temporarily out of stock
Allen Bradley, 140G MCCB 3P 125A, Module Frame Mount
  • RS Stock No. 261-2856
  • Mfr. Part No. 140G-G6C3-C50
Each
MYR2,369.71
Temporarily out of stock
ABB S802S MCB, 2P, 6A Curve C, 690V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-493
  • Mfr. Part No. 2CCS862001R0064
Each
MYR1,423.13
1
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