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

2291 / 999+
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2kA 1SDA07, 4 channels
  • RS Stock No. 259-3755
  • Mfr. Part No. 1SDA071740R1
Each
MYR101,382.64
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 32A, Breaking Capacity 55 kA
  • RS Stock No. 209-6991
  • Mfr. Part No. 3VA1132-5EE46-0AA0
Each
MYR2,650.39
Temporarily out of stock
Siemens SENTRON 5SP3735 MCB, 1P, 35A, Type E
  • RS Stock No. 231-8344
  • Mfr. Part No. 5SP3735-3
Each
MYR784.20
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2.5kA Ekip G Touch LSIG, 3 channels
  • RS Stock No. 259-4293
  • Mfr. Part No. 1SDA072427R1
Each
MYR82,797.29
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4611
  • Mfr. Part No. 3VA2140-0KQ42-0AA0
Each
MYR12,607.69
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 20A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 271-9815
  • Mfr. Part No. 3VA1120-3GE42-0AA0
Each
MYR2,091.97
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 4 channels
  • RS Stock No. 259-4533
  • Mfr. Part No. 1SDA072770R1
Each
MYR44,768.55
Temporarily out of stock
Better World
Siemens RCBO, 13A Current Rating, 2P Poles, 300mA Trip Sensitivity, Sentron Range
  • RS Stock No. 225-8792
  • Mfr. Part No. 5SU1656-6KK13
Each
MYR759.05
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 2.5kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-3235
  • Mfr. Part No. 1SDA071123R1
Each
MYR79,359.12
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 36 kA
  • RS Stock No. 209-6973
  • Mfr. Part No. 3VA1116-4EE42-0AA0
Each
MYR5,800.43
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 80A, Fixed Mount
  • RS Stock No. 260-7459
  • Mfr. Part No. C10V36M080
Each
MYR13,375.98
Temporarily out of stock
Eaton A-PKZ0 Shunt Opening Release for use with Circuit Breaker
  • RS Stock No. 272-0701
  • Mfr. Part No. 172269 A-PKZ0(24V60HZ)
Each
MYR260.85
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 500A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 270-3503
  • Mfr. Part No. 3VA1450-4FF42-0AA0
Each
MYR15,120.17
Temporarily out of stock
Siemens SENTRON 5SP3450 MCB, 4P, 50A, Type E
  • RS Stock No. 231-8326
  • Mfr. Part No. 5SP3450-3
Each
MYR4,077.71
Temporarily out of stock
Schurter TA36 Rocker Circuit Breaker - TA36 2 Pole 60 V dc, 277 V ac Voltage Rating, 10A Current Rating
  • RS Stock No. 221-5623
  • Mfr. Part No. 3-128-232
Each
MYR91.38
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 160A, Fixed Mount
  • RS Stock No. 260-7893
  • Mfr. Part No. C25F44V160
Each
MYR18,610.91
Temporarily out of stock
Better World
Siemens RCBO, 125A Current Rating, 2P Poles, 300mA Trip Sensitivity, Type B, Sentron Range
  • RS Stock No. 243-6226
  • Mfr. Part No. 5SU1624-6KK82
Each
MYR5,064.73
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Touch LI, 4 channels
  • RS Stock No. 259-4538
  • Mfr. Part No. 1SDA072774R1
Each
MYR22,384.47
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4590
  • Mfr. Part No. 3VA2125-7MS36-0AA0
Each
MYR3,423.93
Temporarily out of stock
Siemens SENTRON Wire Connector for use with 3VA52 250
  • RS Stock No. 269-7147
  • Mfr. Part No. 3VA9233-0JK11
Each (In a Pack of 3)
MYR463.49
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