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

2297 / 999+
Bourns SMD Non Resettable Fuse 750mA, 125V ac
  • RS Stock No. 191-4551
  • Mfr. Part No. SF-2410HI075T-2
Each (On a Tape of 10)
MYR5.14
Better World
Schneider Electric TeSys Thermal Circuit Breaker - TeSyS GV 3 Pole 690V ac Voltage Rating, 25A Current Rating
  • RS Stock No. 175-1538
  • Mfr. Part No. GV4PE25B
Each
MYR3,511.37
Siemens Alpha Support for use with Busbar System
  • RS Stock No. 228-8266
  • Mfr. Part No. 8WH9143-0AH01
Each (In a Pack of 50)
MYR4.651
Better World
Siemens, SENTRON MCCB 4P 32A, Breaking Capacity 36 kA
  • RS Stock No. 209-6988
  • Mfr. Part No. 3VA1132-4EF46-0AA0
Each
MYR2,733.28
Better World
Schneider Electric, Compact MCCB 4P 100A, Breaking Capacity 50 kA, Clip-On
  • RS Stock No. 178-7729
  • Mfr. Part No. LV426427
Each
MYR3,292.24
Eaton 100A Tag Fuse, 205 x 60 x 80mm, 1.5kV, 189mm
  • RS Stock No. 282-6216
  • Mfr. Part No. PV-100A-01XL-15
Each
MYR2,103.83
Schurter 8A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 712-4762
  • Mfr. Part No. 0090.0008
Each
MYR85.74
Better World
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Touch LI, 3 channels
  • RS Stock No. 259-9932
  • Mfr. Part No. 1SDA070794R1
Each
MYR23,723.57
Siemens SENTRON Wire Connector for use with 3VA15/25 1000
  • RS Stock No. 269-7213
  • Mfr. Part No. 3VA9504-0JG23
Each (In a Pack of 2)
MYR1,235.46
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3806
  • Mfr. Part No. 3VA2040-8JP32-0AA0
Each
MYR9,262.94
Schurter SMD Non Resettable Fuse 315mA, 277 V ac, 250V dc
  • RS Stock No. 830-4167
  • Mfr. Part No. 3403.0269.23
Each (In a Pack of 10)
MYR7.992
Better World
Siemens RCBO, 13A Current Rating, 2P Poles, 300mA Trip Sensitivity, Sentron Range
  • RS Stock No. 225-8826
  • Mfr. Part No. 5SV1616-6KK13
Each
MYR560.88
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4645
  • Mfr. Part No. 3VA2140-7HK36-0AA0
Each
MYR4,937.92
Better World
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Hi-Touch LSI, 3 channels
  • RS Stock No. 259-3017
  • Mfr. Part No. 1SDA070868R1
Each
MYR43,046.95
Bourns 50A Tag Fuse, 38mm, 170V dc, 24.1mm
  • RS Stock No. 254-4222
  • Mfr. Part No. PF-NT2-50
Each (In a Box of 10)
MYR131.364
ABB Emax2 Electronic Circuit Breaker 6.3kA 1SDA07, 3 channels
  • RS Stock No. 259-4451
  • Mfr. Part No. 1SDA072651R1
Each
MYR281,473.53
ABB Tmax XT Connection Kit for use with Tmax XT
  • RS Stock No. 237-6195
  • Mfr. Part No. 1SDA066985R1 XT2-XT4 W
Each
MYR496.41
ABB Emax2 Electronic Circuit Breaker 5kA 1SDA07, 3 channels
  • RS Stock No. 259-3360
  • Mfr. Part No. 1SDA071275R1
Each
MYR210,570.83
Better World
Siemens, SENTRON MCCB 3P 160A, Breaking Capacity 85 kA
  • RS Stock No. 209-7065
  • Mfr. Part No. 3VA2116-6HN36-0AA0
Each
MYR7,628.41
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4586
  • Mfr. Part No. 3VA2125-7MP36-0AA0
Each
MYR6,823.53
1
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