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
Fuses - PCB
Fuses - PCB

46578 Products showing for Fuses & Circuit Breakers

2228 / 999+
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 36 kA
  • RS Stock No. 210-1670
  • Mfr. Part No. 3VA1163-4EF32-0AA0
Each
MYR1,839.83
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4498
  • Mfr. Part No. 3VA2125-0HL46-0AA0
Each
MYR7,067.88
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3976
  • Mfr. Part No. 3VA2110-7HL36-0AA0
Each
MYR4,789.59
Bourns Thermal Fuse +82°C 40 A, 28V
  • RS Stock No. 258-6375
  • Mfr. Part No. LC82AY-1
Each (In a Pack of 10)
MYR4.693
Siemens SENTRON 1 Phase Busbar, 1mm Pitch
  • RS Stock No. 226-0819
  • Mfr. Part No. 5ST3663-0HG
Each (In a Pack of 10)
MYR74.616
Schneider Electric, ComPacT MCCB 4P 32A, Fixed Mount
  • RS Stock No. 260-7659
  • Mfr. Part No. C11N4TM032B
Each
MYR3,331.83
ABB F200 RCCB, 80A, 2 Pole, 300mA, Type A, 230V ac
  • RS Stock No. 225-6108
  • Mfr. Part No. 2CSF202101R3800 F202 A-80/0.3
Each
MYR1,213.18
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 1P 50A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 271-9344
  • Mfr. Part No. 3VA1150-3ED12-0AA0
Each
MYR793.82
ABB Emax2 Electronic Circuit Breaker 4kA Ekip G Touch LSIG, 3 channels
  • RS Stock No. 259-3331
  • Mfr. Part No. 1SDA071237R1
Each
MYR111,232.84
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 209-4873
  • Mfr. Part No. 3VA1110-6MH32-0AA0
Each
MYR1,964.66
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4684
  • Mfr. Part No. 3VA2163-0HL32-0AA0
Each
MYR5,246.11
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3709
  • Mfr. Part No. 3VA2025-8JP36-0AA0
Each
MYR8,173.74
Schneider Electric, ComPacT MCCB 3P 40A, Fixed Mount
  • RS Stock No. 260-7482
  • Mfr. Part No. C10W32D040
Each
MYR8,051.50
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3989
  • Mfr. Part No. 3VA2110-7JP36-0AA0
Each
MYR9,262.94
ABB Emax2 Electronic Circuit Breaker 4kA Ekip Touch LSIG, 3 channels
  • RS Stock No. 259-3340
  • Mfr. Part No. 1SDA071246R1
Each
MYR139,547.18
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 4 channels
  • RS Stock No. 259-3662
  • Mfr. Part No. 1SDA071635R1
Each
MYR44,697.64
Sensata Airpax Airpax Thermal Circuit Breaker - M39019 Single Pole Panel Mount, 20A Current Rating
  • RS Stock No. 275-0425
  • Mfr. Part No. M39019/02-258
Each
MYR4,891.37
Siemens SENTRON 3VA9 Rotary Operator for use with 3VA1 400/630, 3VA2 400/630
  • RS Stock No. 218-1857
  • Mfr. Part No. 3VA9467-0EK23
Each
MYR1,400.34
Bourns 3.5A Resettable Fuse, 30V
  • RS Stock No. 817-1719
  • Mfr. Part No. MF-S350
Each (In a Pack of 10)
MYR2.228
Schneider Electric, ComPacT MCCB 4P 160A, Fixed Mount
  • RS Stock No. 260-7919
  • Mfr. Part No. C25H42D160
Each
MYR13,524.60
1
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