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

46386 Products showing for Fuses & Circuit Breakers

2243 / 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 160A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 209-5190
  • Mfr. Part No. 3VA2216-6HN32-0AA0
Each
MYR7,187.51
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4694
  • Mfr. Part No. 3VA2163-0HN42-0AA0
Each
MYR9,325.75
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 40A, Fixed Mount
  • RS Stock No. 260-9541
  • Mfr. Part No. C10R45E040
Each
MYR14,934.21
Temporarily out of stock
Siemens SENTRON 5SM2 MCB, 4P, 100A, Type A
  • RS Stock No. 211-9587
  • Mfr. Part No. 5SM2647-8
Each
MYR3,180.53
Temporarily out of stock
Better World
Siemens SENTRON 5SY7 MCB, 4P, 10A Curve B, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 212-9025
  • Mfr. Part No. 5SY7410-6
Each
MYR994.84
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 6.3kA Ekip Touch LSIG, 4 channels
  • RS Stock No. 259-3897
  • Mfr. Part No. 1SDA071926R1
Each
MYR258,149.15
Temporarily out of stock
Legrand 25A Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 266-3146
  • Mfr. Part No. 0 145 25
1 Box of 10
MYR624.45
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 209-5091
  • Mfr. Part No. 3VA2025-6HN42-0AA0
Each
MYR4,714.51
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 3 channels
  • RS Stock No. 259-4372
  • Mfr. Part No. 1SDA072552R1
Each
MYR120,153.59
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 20A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 271-9817
  • Mfr. Part No. 3VA1120-3GF42-0AA0
Each
MYR2,192.25
Temporarily out of stock
Lovato Single Phase Replacement cartridge, 40kA, DIN Rail Mount
  • RS Stock No. 248-5674
  • Mfr. Part No. SGX02DGK10M3
Each
MYR379.55
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Dip LSI, 4 channels
  • RS Stock No. 259-3478
  • Mfr. Part No. 1SDA071433R1
Each
MYR39,124.69
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 80A, Fixed Mount
  • RS Stock No. 260-7611
  • Mfr. Part No. C11F4TM080L
Each
MYR3,654.94
In Stock
Wickmann Fuse Block
  • RS Stock No. 174-0274
  • Mfr. Part No. 0PTF0078P
1 Box of 2000
MYR1,860.17
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 250A, Fixed Mount
  • RS Stock No. 260-8054
  • Mfr. Part No. C25W42D250
Each
MYR19,191.10
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-7918
  • Mfr. Part No. C25H42D100
Each
MYR11,270.12
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 6.3kA 1SDA07, 4 channels
  • RS Stock No. 259-3899
  • Mfr. Part No. 1SDA071928R1
Each
MYR272,459.83
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 1+N, 63A Curve B, 230V AC, 72V DC
  • RS Stock No. 210-3385
  • Mfr. Part No. 5SL4563-6
Each
MYR470.62
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4036
  • Mfr. Part No. 3VA2110-8JQ32-0AA0
Each
MYR10,023.18
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 3 channels
  • RS Stock No. 259-4369
  • Mfr. Part No. 1SDA072548R1
Each
MYR123,220.29
1
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