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

2237 / 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4077
  • Mfr. Part No. 3VA2116-6JP42-0AA0
Each
MYR11,680.16
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 250A Ekip G Touch LSIG, 4 channels
  • RS Stock No. 259-3393
  • Mfr. Part No. 1SDA071327R1
Each
MYR54,621.61
Temporarily out of stock
Eaton RCCB, 25A, 2 Pole, 300mA, Type A, 230V ac
  • RS Stock No. 227-0697
  • Mfr. Part No. 267443 PFGM-25/2/03-A
Each
MYR480.22
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 4 channels
  • RS Stock No. 259-3580
  • Mfr. Part No. 1SDA071558R1
Each
MYR54,919.58
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 160A, Breaking Capacity 55 kA, DIN Rail Mount
  • RS Stock No. 271-9788
  • Mfr. Part No. 3VA1116-5FE46-0AA0
Each
MYR5,964.16
Temporarily out of stock
Siemens SENTRON Handle, Lockable for use with Draw Out Unit
  • RS Stock No. 210-9416
  • Mfr. Part No. 3VA9987-0KD81
Each
MYR863.47
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4635
  • Mfr. Part No. 3VA2140-6JP46-0AA0
Each
MYR8,502.69
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 3 channels
  • RS Stock No. 259-3339
  • Mfr. Part No. 1SDA071245R1
Each
MYR135,420.25
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 160A, Fixed Mount
  • RS Stock No. 260-7677
  • Mfr. Part No. C12B4TM160B
Each
MYR5,398.16
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 4 channels
  • RS Stock No. 259-3818
  • Mfr. Part No. 1SDA071833R1
Each
MYR140,225.73
Temporarily out of stock
Siemens 25A Cartridge Fuse
  • RS Stock No. 210-6950
  • Mfr. Part No. 3NC1425-5
Each (In a Pack of 10)
MYR153.847
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 6.3kA Ekip Touch LSIG, 3 channels
  • RS Stock No. 259-4457
  • Mfr. Part No. 1SDA072656R1
Each
MYR287,235.18
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3581
  • Mfr. Part No. 3VA2010-7JP36-0AA0
Each
MYR9,386.86
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 250A, Fixed Mount
  • RS Stock No. 260-8018
  • Mfr. Part No. C25V42D250
Each
MYR17,118.93
Temporarily out of stock
Siemens SENTRON Wire Connector for use with 3VA1
  • RS Stock No. 269-7070
  • Mfr. Part No. 3VA9114-0JG10
Each (In a Pack of 4)
MYR71.92
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4043
  • Mfr. Part No. 3VA2110-8KP42-0AA0
Each
MYR11,123.65
Temporarily out of stock
Better World
Siemens RCBO, 20A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type B, Sentron Range
  • RS Stock No. 243-6134
  • Mfr. Part No. 5SU1324-6FA20
Each
MYR990.89
Temporarily out of stock
Siemens SENTRON 5SM2 MCB, 2P, 63A, Type A
  • RS Stock No. 211-9568
  • Mfr. Part No. 5SM2342-6KK01
Each
MYR1,435.47
Temporarily out of stock
Siemens SENTRON Wire Connector for use with 3VA15/25 1000
  • RS Stock No. 269-7214
  • Mfr. Part No. 3VA9504-0JG32
Each (In a Pack of 4)
MYR666.085
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4573
  • Mfr. Part No. 3VA2125-7KP32-0AA0
Each
MYR9,499.37
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