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

2256 / 999+
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 160A, Breaking Capacity 55 kA, DIN Rail Mount
  • RS Stock No. 271-9794
  • Mfr. Part No. 3VA1116-5GE46-0AA0
Each
MYR5,964.16
ABB Emax2 Electronic Circuit Breaker 2kA 1SDA07, 4 channels
  • RS Stock No. 259-3693
  • Mfr. Part No. 1SDA071668R1
Each
MYR69,508.84
ABB Tmax XT Front Terminal for use with XT4
  • RS Stock No. 237-6165
  • Mfr. Part No. 1SDA066934R1 MC CuAl 6x35 XT4 4PCS
Each
MYR1,274.54
Better World
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Hi-Touch LSI, 3 channels
  • RS Stock No. 259-9945
  • Mfr. Part No. 1SDA070809R1
Each
MYR48,977.76
Siemens ALPHA Distribution Board
  • RS Stock No. 272-0337
  • Mfr. Part No. 8GK1082-5KK21
Each
MYR5,969.10
Siemens ALPHA Distribution Board
  • RS Stock No. 272-0316
  • Mfr. Part No. 8GK1072-4KK30
Each
MYR7,461.46
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4510
  • Mfr. Part No. 3VA2125-0KP42-0AA0
Each
MYR11,514.75
ABB Emax2 Electronic Circuit Breaker 6.3kA Ekip G Touch LSIG, 3 channels
  • RS Stock No. 259-3372
  • Mfr. Part No. 1SDA071297R1
Each
MYR238,913.48
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-3750
  • Mfr. Part No. 3VA2040-6JP46-0AA0
Each
MYR9,724.18
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 16A, Breaking Capacity 55 kA, DIN Rail Mount
  • RS Stock No. 271-9464
  • Mfr. Part No. 3VA1196-5ED46-0AA0
Each
MYR2,679.43
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 4 / f channels
  • RS Stock No. 259-3933
  • Mfr. Part No. 1SDA071969R1
Each
MYR220,713.13
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4056
  • Mfr. Part No. 3VA2116-0HM46-0AA0
Each
MYR12,913.31
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 4 / f channels
  • RS Stock No. 259-3918
  • Mfr. Part No. 1SDA071955R1
Each
MYR154,069.98
ABB Emax2 Electronic Circuit Breaker 3.2kA 1SDA07, 3 channels
  • RS Stock No. 259-4342
  • Mfr. Part No. 1SDA072510R1
Each
MYR107,608.68
Phoenix Contact Thermal Circuit Breaker - CB TM2 2 Pole 80V dc Voltage Rating, 1A Current Rating
  • RS Stock No. 217-6366
  • Mfr. Part No. 2800869
Each
MYR471.41
Better World
Siemens, SENTRON MCCB 3P 160A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4054
  • Mfr. Part No. 3VA2116-0HM36-0AA0
Each
MYR10,054.03
Better World
ABB Emax2 Electronic Circuit Breaker 2.5kA Ekip Hi-Touch LSI, 3 channels
  • RS Stock No. 259-3200
  • Mfr. Part No. 1SDA071069R1
Each
MYR69,601.77
Wickmann Resettable Fuse, 125V
  • RS Stock No. 174-0316
  • Mfr. Part No. 046002.5UR
Each (On a Reel of 500)
MYR8.455
Better World
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip G Hi-Touch LSIG, 3 channels
  • RS Stock No. 259-3028
  • Mfr. Part No. 1SDA070880R1
Each
MYR50,029.89
Phoenix Contact Thermomagnetic Device Circuit Breaker Thermal Circuit Breaker - CB Single Pole 50V dc Voltage Rating,
  • RS Stock No. 212-8787
  • Mfr. Part No. 2800854
Each
MYR214.59
1
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