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

2244 / 999+
Omron Busbar
  • RS Stock No. 111-3534
  • Mfr. Part No. PYDN-7.75-030R
Each
MYR6.88
Schneider Electric Connection Unit for use with ComPact NS630b → 1600 Circuit Breaker, ComPact NS630b →
  • RS Stock No. 247-1867
  • Mfr. Part No. 33728
Each
MYR1,501.70
Eaton 1A Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 703-8409P
  • Mfr. Part No. C14G1
Each (Supplied in a Box)
MYR15.325
Phoenix Contact Thermomagnetic Device Circuit Breaker Thermal Circuit Breaker - CB Single Pole 50V dc Voltage Rating,
  • RS Stock No. 212-8783
  • Mfr. Part No. 2800844
Each
MYR235.69
ABB Emax2 Electronic Circuit Breaker 800A 1SDA07, 4 channels
  • RS Stock No. 259-4499
  • Mfr. Part No. 1SDA072721R1
Each
MYR20,279.97
Siemens, SENTRON MCCB 3P 630A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 270-4805
  • Mfr. Part No. 3VA2563-5JP32-0AA0
Each
MYR14,279.37
Better World
Schneider Electric, Compact MCCB 4P 40A, Breaking Capacity 70 kA, Clip-On
  • RS Stock No. 178-7779
  • Mfr. Part No. LV426513
Each
MYR2,891.26
ABB Emax2 Electronic Circuit Breaker 1.25kA 1SDA07, 3 channels
  • RS Stock No. 259-4079
  • Mfr. Part No. 1SDA072172R1
Each
MYR19,323.23
Lovato MCB, 3P, 63A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 188-1672
  • Mfr. Part No. P1MBUL3PC63
Each
MYR1,363.31
Bourns Surface Mount Fuse 1.5A, 65V dc
  • RS Stock No. 245-9249
  • Mfr. Part No. SF-1206SA150M-2
Each (On a Tape of 10)
MYR5.287
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 16A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9472
  • Mfr. Part No. 3VA1196-6GD46-0AA0
Each
MYR1,985.15
ABB Emax2 Electronic Circuit Breaker 800A 1SDA07, 3 channels
  • RS Stock No. 259-4150
  • Mfr. Part No. 1SDA072262R1
Each
MYR34,103.84
ABB Emax2 Electronic Circuit Breaker 800A 1SDA07, 4 channels
  • RS Stock No. 259-4515
  • Mfr. Part No. 1SDA072737R1
Each
MYR41,229.21
Better World
ABB Emax2 Electronic Circuit Breaker 2.5kA Ekip G Hi-Touch LSIG, 3 channels
  • RS Stock No. 259-3211
  • Mfr. Part No. 1SDA071080R1
Each
MYR82,704.55
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 160A, Breaking Capacity 55 kA, DIN Rail Mount
  • RS Stock No. 271-9785
  • Mfr. Part No. 3VA1116-5FD42-0AA0
Each
MYR5,606.81
Better World
Siemens SENTRON 5SY6 MCB, 1+N, 1.6A Curve C, 5 kA Breaking Capacity
  • RS Stock No. 216-4787
  • Mfr. Part No. 5SY6515-7
Each
MYR343.09
Schneider Electric, ComPacT MCCB 3P 40A, Fixed Mount
  • RS Stock No. 260-7490
  • Mfr. Part No. C10W36E040
Each
MYR15,985.46
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4549
  • Mfr. Part No. 3VA2125-7HK42-0AA0
Each
MYR5,432.32
Siemens, SENTRON MCCB 4P 1.25kA, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-4900
  • Mfr. Part No. 3VA2612-7HM42-0AA0
Each
MYR56,771.10
Better World
Siemens SENTRON 5SY7 MCB, 2P, 3A Curve C, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 209-6707
  • Mfr. Part No. 5SY7203-7
Each
MYR495.34
1
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