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

45876 Products showing for Fuses & Circuit Breakers

2267 / 999+
Temporarily out of stock
Better World
ABB, XT4H MCCB 3P 160A, Fixed Mount
  • RS Stock No. 236-6673
  • Mfr. Part No. 1SDA068291R1 XT4H 160 BLOC FF
Each
MYR2,817.08
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1kA Ekip G Touch LSIG, 3 channels
  • RS Stock No. 259-3083
  • Mfr. Part No. 1SDA070937R1
Each
MYR51,016.42
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 4 channels
  • RS Stock No. 259-4644
  • Mfr. Part No. 1SDA072916R1
Each
MYR44,047.16
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 2kA 1SDA07, 3 channels
  • RS Stock No. 259-3175
  • Mfr. Part No. 1SDA071039R1
Each
MYR62,818.19
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 630A Ekip Dip LI, 4 channels
  • RS Stock No. 259-4483
  • Mfr. Part No. 1SDA072691R1
Each
MYR19,323.23
Temporarily out of stock
Eaton xEffect MCB, 2P, 50A Curve B
  • RS Stock No. 227-0673
  • Mfr. Part No. 239093 FAZ6-B50/2
Each
MYR379.95
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 3P, 8A Curve C, 400V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 209-6629
  • Mfr. Part No. 5SL4308-7
Each
MYR541.85
In Stock
ETA Thermal Circuit Breaker - 3120-N 5 Pole 50 V DC, 240 V AC Voltage Rating, 2.5A Current Rating
  • RS Stock No. 210-2097
  • Mfr. Part No. 3120-N551-H7T1-W14DR4-2.5A
Each
MYR156.79
In Stock
Littelfuse 4A F Cartridge Fuse, 10 x 35mm
  • RS Stock No. 738-3144
  • Mfr. Part No. 0BLS004.T
Each
MYR77.41
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1.25kA 1SDA07, 3 channels
  • RS Stock No. 259-3125
  • Mfr. Part No. 1SDA070976R1
Each
MYR38,750.24
Temporarily out of stock
Better World
Siemens SENTRON 5SY8 MCB, 1P, 40A Curve C
  • RS Stock No. 216-5949
  • Mfr. Part No. 5SY8140-7
Each
MYR306.95
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3623
  • Mfr. Part No. 3VA2010-8KP42-0AA0
Each
MYR13,719.71
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip G Touch LSIG, 4 channels
  • RS Stock No. 259-4662
  • Mfr. Part No. 1SDA072937R1
Each
MYR56,592.07
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3971
  • Mfr. Part No. 3VA2110-7HK36-0AA0
Each
MYR4,789.59
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 16A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 271-9630
  • Mfr. Part No. 3VA10963ED460AA0
Each
MYR2,192.25
Temporarily out of stock
Siemens SENTRON 5SP3825 MCB, 3P, 25A, Type E
  • RS Stock No. 231-8363
  • Mfr. Part No. 5SP3825-2
Each
MYR2,366.86
Temporarily out of stock
Siemens SENTRON 5SP3235 MCB, 2P, 35A, Type E
  • RS Stock No. 231-8308
  • Mfr. Part No. 5SP3235-3
Each
MYR1,998.57
Temporarily out of stock
Siemens SENTRON 5SP3716 MCB, 1P, 16A, Type E
  • RS Stock No. 231-8332
  • Mfr. Part No. 5SP3716-3
Each
MYR711.19
Temporarily out of stock
Better World
Siemens SENTRON 3VA1 MCB, 2P, 80A
  • RS Stock No. 224-7883
  • Mfr. Part No. 3VA1180-3ED26-0AA0
Each
MYR1,604.54
Temporarily out of stock
ABB 25A Tag Fuse, 135 x 30 x 65mm, 500V
  • RS Stock No. 250-4418
  • Mfr. Part No. 1SCA022697R6500
1 Box of 3
MYR354.98
1
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