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

2260 / 999+
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-3957
  • Mfr. Part No. 3VA2110-6JP32-0AA0
Each
MYR7,454.90
Littelfuse SMD Non Resettable Fuse 1A, 63V
  • RS Stock No. 820-7057
  • Mfr. Part No. 0437001.WR
Each (In a Pack of 100)
MYR4.623
Siemens 24V ac Circuit Trip
  • RS Stock No. 223-7634
  • Mfr. Part No. 5TT4426-2
Each
MYR524.76
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 4A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9636
  • Mfr. Part No. 3VA11046MG320AA0
Each
MYR2,239.19
ABB Emax2 Electronic Circuit Breaker 5kA 1SDA07, 4 / f channels
  • RS Stock No. 259-3955
  • Mfr. Part No. 1SDA071999R1
Each
MYR268,928.69
Schneider Electric, ComPacT MCCB 3P 125A, Fixed Mount
  • RS Stock No. 260-7673
  • Mfr. Part No. C12B3TM125B
Each
MYR2,915.47
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Hi-Touch LSI, 4 channels
  • RS Stock No. 259-4693
  • Mfr. Part No. 1SDA072968R1
Each
MYR58,915.39
Schneider Electric, ComPacT MCCB 4P 50A, Fixed Mount
  • RS Stock No. 260-7607
  • Mfr. Part No. C11F4TM050L
Each
MYR3,280.23
Better World
Siemens, SENTRON MCCB 4P 32A, Breaking Capacity 36 kA
  • RS Stock No. 209-6796
  • Mfr. Part No. 3VA1132-4ED42-0AA0
Each
MYR2,134.75
Legrand Circuit Breaker for use with Cndustrial Cartridge
  • RS Stock No. 266-0235
  • Mfr. Part No. 0 215 33
Each
MYR408.31
ABB Emax2 Electronic Circuit Breaker 3.2kA 1SDA07, 4 channels
  • RS Stock No. 259-3801
  • Mfr. Part No. 1SDA071806R1
Each
MYR123,777.95
Better World
Siemens SENTRON 3VA1 MCB, 3P, 1A
  • RS Stock No. 224-7894
  • Mfr. Part No. 3VA1181-5MG36-0AA0
Each
MYR2,113.83
ABB Emax2 Electronic Circuit Breaker 2kA 1SDA07, 4 channels
  • RS Stock No. 259-3698
  • Mfr. Part No. 1SDA071673R1
Each
MYR60,402.16
Schurter SMD Non Resettable Fuse 6.3A, 277 V ac, 125V dc
  • RS Stock No. 830-4206
  • Mfr. Part No. 3403.0282.23
Each (In a Pack of 10)
MYR5.833
ABB Emax2 Electronic Circuit Breaker 2.5kA Ekip Touch LSIG, 4 channels
  • RS Stock No. 259-3730
  • Mfr. Part No. 1SDA071706R1
Each
MYR77,128.89
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3804
  • Mfr. Part No. 3VA2040-8HN42-0AA0
Each
MYR6,598.55
Eaton xEffect MCB, 4P, 10A Curve B, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4393
  • Mfr. Part No. 239181 FAZ6-B10/4
Each
MYR891.13
Better World
ABB Emax2 Electronic Circuit Breaker 2kA Ekip G Touch LSIG, 3 channels
  • RS Stock No. 259-3165
  • Mfr. Part No. 1SDA071027R1
Each
MYR58,264.86
Bourns 50A Tag Fuse, 66mm, 170V dc, 24.1mm
  • RS Stock No. 254-4230
  • Mfr. Part No. PF-NT5-50
Each (In a Box of 10)
MYR111.891
ABB 300A Tag Fuse, 150 x 51 x 72mm, 500V
  • RS Stock No. 250-4444
  • Mfr. Part No. 1SCA022697R9270
1 Box of 3
MYR457.00
1
2260
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