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

332 / 999+
In Stock
Schurter Surface Mount Fuse 7A, 125V ac
  • RS Stock No. 270-7947
  • Mfr. Part No. 3404.0019.11
Each
MYR4.19
Temporarily out of stock
RS PRO 15A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 188-4482
1 Box of 1000
MYR52,829.12
Temporarily out of stock
Schneider Electric EZ9R RCCB, 63A, 2 Pole, 30mA, Type A, 230V ac
  • RS Stock No. 654-804
  • Mfr. Part No. EZ9R46263
Each
MYR325.83
In Stock
Siemens Single Phase Industrial Surge Protection, 16A, 230V (Volts), DIN Rail Mount
  • RS Stock No. 266-9589
  • Mfr. Part No. 5SY1716-2
Each
MYR204.95
Temporarily out of stock
Siemens ALPHA Assembly Kit for use with 3VA2 Molded Case Circuit Breakers
  • RS Stock No. 629-328
  • Mfr. Part No. 8GK4736-4KK12
Each
MYR1,017.28
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 2P, 3A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 209-6465
  • Mfr. Part No. 5SL4203-8
Each
MYR535.46
Temporarily out of stock
Eaton IZMX40H3-V16F-1 Electronic Circuit Breaker 1.6kA , Fixed
  • RS Stock No. 132-681
  • Mfr. Part No. 183721 IZMX40H3-V16F-1
Each
MYR60,198.01
In Stock
Better World
Schneider Electric iID RCCB, 25A, 4 Pole, 300mA
  • RS Stock No. 734-9352
  • Mfr. Part No. A9R14425
Each
MYR867.77
In Stock
ETA Busbar, 24V dc
  • RS Stock No. 723-4862
  • Mfr. Part No. X222.611.02 GREY BUSBAR (500MM)
Each
MYR206.09
Temporarily out of stock
Better World
Schneider Electric MCCB, Clip-On
  • RS Stock No. 178-7863
  • Mfr. Part No. LV426842
Each
MYR731.19
Temporarily out of stock
Siemens, SENTRON MCCB 3P 125A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-962
  • Mfr. Part No. 3VA5212-6ED31-0AA0
Each
MYR6,576.75
In Stock
Schurter Fuse Holder Fusedrawer
  • RS Stock No. 867-6857
  • Mfr. Part No. 4303.2403
Each
MYR33.92
Temporarily out of stock
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 1kA, Breaking Capacity 35 kA
  • RS Stock No. 249-190
  • Mfr. Part No. 3VA6610-6KT32-0AA0
Each
MYR47,528.25
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 4 channels
  • RS Stock No. 259-4704
  • Mfr. Part No. 1SDA072982R1
Each
MYR49,157.91
In Stock
Better World
Schneider Electric Multi 9 C60N MCB, 2P, 32A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 214-2068
  • Mfr. Part No. M9F11232
Each
MYR431.66
In Stock
Hager Electronic Circuit Breaker 32A MFS, 1 channels
  • RS Stock No. 251-2070
  • Mfr. Part No. MFS732
Each (In a Pack of 12)
MYR157.391
In Stock
Siemens SENTRON 2 Phase Busbar, 18mm Pitch
  • RS Stock No. 124-3141
  • Mfr. Part No. 5ST3705
Each
MYR431.64
In Stock
Mersen 80A Ceramic Cartridge Fuse, 22 x 58mm
  • RS Stock No. 188-7511
  • Mfr. Part No. H216667
Each (In a Pack of 10)
MYR36.095
In Stock
SIB Copper Earth Bar L. 46mm x W. 150mm x H. 60mm 2 Ways
  • RS Stock No. 270-5241
  • Mfr. Part No. P04388
1 Box of 10
MYR367.31
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 3 kA
  • RS Stock No. 245-237
  • Mfr. Part No. 3VA6210-7HN31-0AA0
Each
MYR12,221.55
1
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