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

2235 / 999+
Temporarily out of stock
Eaton AZ MCB, 2P, 50A Curve B, 400V AC, 25 kA Breaking Capacity
  • RS Stock No. 272-0730
  • Mfr. Part No. 174497 AZ-2-B50
Each
MYR1,181.12
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip Hi-Touch LSI, 4 channels
  • RS Stock No. 259-4663
  • Mfr. Part No. 1SDA072938R1
Each
MYR55,012.49
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A 1SDA07, 3 channels
  • RS Stock No. 259-4031
  • Mfr. Part No. 1SDA072101R1
Each
MYR15,401.32
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3978
  • Mfr. Part No. 3VA2110-7HL46-0AA0
Each
MYR6,155.35
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 25A, Fixed Mount
  • RS Stock No. 260-7658
  • Mfr. Part No. C11N4TM025L
Each
MYR3,431.57
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2.5kA Ekip G Touch LSIG, 4 channels
  • RS Stock No. 259-3721
  • Mfr. Part No. 1SDA071697R1
Each
MYR81,961.01
Temporarily out of stock
Siemens 12A Cartridge Fuse
  • RS Stock No. 210-7011
  • Mfr. Part No. 3NW8006-1
Each (In a Pack of 10)
MYR29.745
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3583
  • Mfr. Part No. 3VA2010-7JP46-0AA0
Each
MYR11,579.08
Temporarily out of stock
Better World
Eaton 315A Tag Fuse, 217 x 82 x 94mm, 1kV, 167mm
  • RS Stock No. 282-6234
  • Mfr. Part No. PV-315A-2XL-B
Each
MYR2,301.71
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4122
  • Mfr. Part No. 3VA2116-8HL46-0AA0
Each
MYR10,054.03
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-9540
  • Mfr. Part No. C10R42D100
Each
MYR8,683.49
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 271-9333
  • Mfr. Part No. 3VA1140-5GD46-0AA0
Each
MYR2,679.43
Temporarily out of stock
Better World
Siemens SENTRON 3VA1 MCB, 2P, 50A
  • RS Stock No. 224-7866
  • Mfr. Part No. 3VA1150-5ED22-0AA0
Each
MYR1,651.63
Currently unavailable
Bourns 150A Tag Fuse, 38mm, 800V ac/dc, 24.1mm
  • RS Stock No. 254-4111
  • Mfr. Part No. PF-FB1-150
Each (In a Box of 20)
MYR458.405
Temporarily out of stock
Siemens 24V ac Circuit Trip
  • RS Stock No. 223-7630
  • Mfr. Part No. 5TT4424-2
Each
MYR494.44
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 3 channels
  • RS Stock No. 259-9946
  • Mfr. Part No. 1SDA070810R1
Each
MYR51,847.49
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 3.2kA Ekip Hi-Touch LSI, 3 channels
  • RS Stock No. 259-4341
  • Mfr. Part No. 1SDA072509R1
Each
MYR104,913.59
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 25A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 271-9847
  • Mfr. Part No. 3VA1125-3GD46-0AA0
Each
MYR2,272.48
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip Hi-Touch LSI, 4 channels
  • RS Stock No. 259-4673
  • Mfr. Part No. 1SDA072948R1
Each
MYR57,521.34
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 50A, Breaking Capacity 70 kA
  • RS Stock No. 209-6836
  • Mfr. Part No. 3VA1150-6ED42-0AA0
Each
MYR1,836.82
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