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

2239 / 999+
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4047
  • Mfr. Part No. 3VA2110-8KQ42-0AA0
Each
MYR12,001.65
ABB Emax2 Electronic Circuit Breaker 5kA 1SDA07, 4 / f channels
  • RS Stock No. 259-3946
  • Mfr. Part No. 1SDA071990R1
Each
MYR231,107.49
Better World
Siemens SENTRON 3VA1 MCB, 1P, 40A
  • RS Stock No. 224-7851
  • Mfr. Part No. 3VA1140-4ED16-0AA0
Each
MYR892.77
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-4106
  • Mfr. Part No. 1SDA072213R1
Each
MYR24,680.16
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 4 channels
  • RS Stock No. 259-3666
  • Mfr. Part No. 1SDA071639R1
Each
MYR64,490.91
Better World
Siemens, SENTRON MCCB 3P 125A, Breaking Capacity 55 kA
  • RS Stock No. 209-6757
  • Mfr. Part No. 3VA1112-5EE36-0AA0
Each
MYR3,953.02
Phoenix Contact Thermal Circuit Breaker - CB TM1 Single Pole 50V dc Voltage Rating, 8A Current Rating
  • RS Stock No. 217-6362
  • Mfr. Part No. 2800864
Each
MYR235.69
ABB Tmax T Sliding Contacts for use with Circuit Breaker
  • RS Stock No. 231-9289
  • Mfr. Part No. 1SDA062169R1 T7-M-X1
1 Box of 1
MYR681.39
Lovato MCB, MCB
  • RS Stock No. 188-1676
  • Mfr. Part No. ULC256A18A
Each
MYR989.69
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 32A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 271-9879
  • Mfr. Part No. 3VA1132-3ED46-0AA0
Each
MYR2,272.48
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 210-1714
  • Mfr. Part No. 3VA2110-5KP32-0AA0
Each
MYR6,349.19
Better World
Schneider Electric iC60 RCD, 63A, 300mA
  • RS Stock No. 776-2897
  • Mfr. Part No. A9V35263
Each
MYR3,063.20
Phoenix Contact Trabtech Thermal Circuit Breaker - CB TM1 Single Pole 50V dc Voltage Rating, 16A Current Rating
  • RS Stock No. 201-5504
  • Mfr. Part No. 2800856
Each
MYR240.99
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 160A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 272-0197
  • Mfr. Part No. 3VA2116-8JQ42-0AA0
Each
MYR14,881.60
Schneider Electric, ComPacT MCCB 3P 320A, Fixed Mount
  • RS Stock No. 260-8164
  • Mfr. Part No. C40W31M320
Each
MYR21,473.63
Better World
Siemens SENTRON 5SL4 MCB, 3+N, 8A Curve B, 400V AC, 72V DC
  • RS Stock No. 209-7468
  • Mfr. Part No. 5SL4408-6
Each
MYR797.41
Better World
Siemens SENTRON 5SY7 MCB, 1+N, 20A Curve C, 230V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 212-8916
  • Mfr. Part No. 5SY7520-7
Each
MYR410.39
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 2.5 kA, Fixed Mount
  • RS Stock No. 270-4736
  • Mfr. Part No. 3VA2163-7HL32-0AA0
Each
MYR5,013.14
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip G Touch LSIG, 4 channels
  • RS Stock No. 259-3621
  • Mfr. Part No. 1SDA071597R1
Each
MYR60,309.17
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3625
  • Mfr. Part No. 3VA2010-8KQ32-0AA0
Each
MYR11,024.86
1
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