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

2255 / 999+
ABB Emax2 Electronic Circuit Breaker 4kA Ekip G Touch LSIG, 4 / f channels
  • RS Stock No. 259-3921
  • Mfr. Part No. 1SDA071957R1
Each
MYR148,589.17
Siemens SENTRON Conversion Kit for use with 3VA1 250
  • RS Stock No. 210-9324
  • Mfr. Part No. 3VA9213-0KP10
Each
MYR703.08
Schurter TA36 Rocker Circuit Breaker - TA36 2 Pole 60 V dc, 277 V ac Voltage Rating, 10A Current Rating
  • RS Stock No. 221-5624
  • Mfr. Part No. 3-128-233
1 Box of 10
MYR737.01
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 4 channels
  • RS Stock No. 259-4530
  • Mfr. Part No. 1SDA072767R1
Each
MYR40,846.71
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 3 channels
  • RS Stock No. 259-4170
  • Mfr. Part No. 1SDA072285R1
Each
MYR33,081.86
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 80A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9438
  • Mfr. Part No. 3VA1180-6GF42-0AA0
Each
MYR2,441.26
Better World
Siemens RCBO, 13A Current Rating, 4P Poles, 30mA Trip Sensitivity, Type C, Sentron Range
  • RS Stock No. 243-6220
  • Mfr. Part No. 5SU1346-7FP13
Each
MYR2,169.27
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4576
  • Mfr. Part No. 3VA2125-7KP42-0AA0
Each
MYR10,184.99
Better World
Siemens SENTRON 5SL4 MCB, 3+N, 50A Curve B, 400V AC, 72V DC
  • RS Stock No. 209-7499
  • Mfr. Part No. 5SL4650-6
Each
MYR945.38
Siemens, SENTRON MCCB 3P 1kA, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 270-4774
  • Mfr. Part No. 3VA2510-5HM32-0AA0
Each
MYR23,209.19
Siemens Single Phase Industrial Surge Protection, 2A, 230V (Volts), DIN Rail Mount
  • RS Stock No. 266-9585
  • Mfr. Part No. 5SY1708-2
Each
MYR200.15
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9684
  • Mfr. Part No. 3VA11106FE460AA0
Each
MYR3,832.89
ABB Emax2 Electronic Circuit Breaker 1.25kA 1SDA07, 3 channels
  • RS Stock No. 259-4098
  • Mfr. Part No. 1SDA072192R1
Each
MYR29,941.45
Bourns 225A Tag Fuse, 66mm, 800V ac/dc, 24.1mm
  • RS Stock No. 254-4120
  • Mfr. Part No. PF-FB1-225
Each
MYR898.18
ABB Emax2 Electronic Circuit Breaker 6.3kA 1SDA07, 4 channels
  • RS Stock No. 259-3905
  • Mfr. Part No. 1SDA071934R1
Each
MYR296,434.86
ABB Emax2 Electronic Circuit Breaker 6.3kA 1SDA07, 3 channels
  • RS Stock No. 259-4458
  • Mfr. Part No. 1SDA072657R1
Each
MYR302,196.26
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3776
  • Mfr. Part No. 3VA2040-7JP36-0AA0
Each
MYR8,993.40
Schneider Electric, ComPacT MCCB 3P 40A, Fixed Mount
  • RS Stock No. 260-7557
  • Mfr. Part No. C11E3TM040B
Each
MYR1,731.48
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 2.5 kA, Fixed Mount
  • RS Stock No. 270-4744
  • Mfr. Part No. 3VA2163-7HN32-0AA0
Each
MYR5,614.26
Eaton 3A Ceramic Cartridge Fuse, 21 x 142mm
  • RS Stock No. 703-4081
  • Mfr. Part No. 5-5AMWNA3-0E
Each
MYR864.84
1
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