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

2305 / 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3881
  • Mfr. Part No. 3VA2063-7KP42-0AA0
Each
MYR11,410.44
Temporarily out of stock
Siemens SENTRON 5SP4 MCB, 2P, 80A Curve B, 400V AC
  • RS Stock No. 209-7504
  • Mfr. Part No. 5SP4280-6
Each
MYR1,019.02
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 209-5100
  • Mfr. Part No. 3VA2040-6HL36-0AA0
Each
MYR3,300.08
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4604
  • Mfr. Part No. 3VA2140-0HN46-0AA0
Each
MYR9,619.16
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 2P 80A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 271-9409
  • Mfr. Part No. 3VA1180-3ED22-0AA0
Each
MYR1,790.36
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2kA 1SDA07, 4 channels
  • RS Stock No. 259-3692
  • Mfr. Part No. 1SDA071667R1
Each
MYR70,995.69
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4637
  • Mfr. Part No. 3VA2140-6JQ36-0AA0
Each
MYR9,342.52
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 3P 150A, Fixed Mount
  • RS Stock No. 260-7774
  • Mfr. Part No. C16H32M150
Each
MYR7,413.96
Temporarily out of stock
Siemens, SENTRON MCCB 3P 630A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 270-4807
  • Mfr. Part No. 3VA2563-5KQ32-0AA0
Each
MYR23,439.20
Temporarily out of stock
Siemens 230V ac Circuit Trip
  • RS Stock No. 223-7622
  • Mfr. Part No. 5TT4407-0
Each
MYR390.94
Temporarily out of stock
Siemens 10A Cartridge Fuse
  • RS Stock No. 210-6949
  • Mfr. Part No. 3NC1410-5
Each (In a Pack of 10)
MYR151.401
In Stock
Siemens SENTRON 5SJ4 MCB, 1P, 4A Curve C, 14 kA Breaking Capacity
  • RS Stock No. 202-7044
  • Mfr. Part No. 5SJ4104-7HG41
Each
MYR321.25
In Stock
Schurter TA36 Rocker Circuit Breaker - TA36 2 Pole 60 V dc, 277 V ac Voltage Rating, 15A Current Rating
  • RS Stock No. 221-5609
  • Mfr. Part No. 3-128-217
1 Box of 10
MYR737.01
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 3.2kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-3244
  • Mfr. Part No. 1SDA071142R1
Each
MYR62,911.14
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9406
  • Mfr. Part No. 3VA1163-6GF42-0AA0
Each
MYR2,214.41
Temporarily out of stock
ABB MCCB Molded Case Circuit Breaker 4P 320A, Fixed Mount
  • RS Stock No. 250-4063
  • Mfr. Part No. 1SDA054328R1
Each
MYR16,368.76
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 32A, Breaking Capacity 36 kA
  • RS Stock No. 209-6799
  • Mfr. Part No. 3VA1132-4EF42-0AA0
Each
MYR2,303.22
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3681
  • Mfr. Part No. 3VA2025-7JQ32-0AA0
Each
MYR10,679.72
Temporarily out of stock
Siemens SENTRON Wire Connector for use with 3VA5/6 400/600
  • RS Stock No. 269-7193
  • Mfr. Part No. 3VA9473-0JC23
Each (In a Pack of 3)
MYR919.903
Temporarily out of stock
ABB OS Switch Disconnector for use with Low-Voltage Switch Technology
  • RS Stock No. 259-9593
  • Mfr. Part No. 1SCA022770R3140
Each
MYR1,494.64
1
2305
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