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

180 / 999+
Siemens SENTRON Voltage Tap Module for use with ETU 8-Series
  • RS Stock No. 155-240
  • Mfr. Part No. 3VA9987-0UC10
Each
MYR344.54
Siemens 10A Cartridge Fuse, 14 X 51mm
  • RS Stock No. 665-119
  • Mfr. Part No. 3NW8103-1
1 Pack of 10
MYR265.54
ABB MCCB Molded Case Circuit Breaker 4P 630A, Fixed Mount
  • RS Stock No. 250-4147
  • Mfr. Part No. 1SDA054418R1
Each
MYR23,744.73
Better World
Schneider Electric Busbar Trunking Fixing Bracket, Canalis KN Series
  • RS Stock No. 219-8899
  • Mfr. Part No. KNB160ZF2
Each (In a Pack of 10)
MYR35.426
Mersen 63A Bolted Tag Fuse, A4C, 240 V dc, 415V ac, 94mm
  • RS Stock No. 178-1039
  • Mfr. Part No. T1045298 / BTCP42V63
Each (In a Pack of 10)
MYR102.964
Eaton 250A British Standard Fuse, B3, 415V ac, 111mm
  • RS Stock No. 139-984
  • Mfr. Part No. ED250
Each
MYR334.38
Better World
ABB Emax2 Electronic Circuit Breaker 2kA Ekip Touch LI, 3 channels
  • RS Stock No. 259-3189
  • Mfr. Part No. 1SDA071054R1
Each
MYR47,299.47
Better World
Siemens SENTRON Electronic Circuit Breaker 160A 3VA2, 4 channels
  • RS Stock No. 157-099
  • Mfr. Part No. 3VA2116-5JQ42-0AA0
Each
MYR14,128.58
ABB System Pro M Compact S200 M UC MCB, 4P, 60A, Type Z, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 200-848
  • Mfr. Part No. 2CDS274061R0588
Each
MYR7,071.32
Schurter 10A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 1P, 250V ac
  • RS Stock No. 866-3435
  • Mfr. Part No. 0031.1661
Each (In a Pack of 50)
MYR6.326
Schneider Electric A9R RCCB, 80A, 4 Pole, 500mA, Type A-SI, 415V ac
  • RS Stock No. 339-776
  • Mfr. Part No. A9R37480
Each
MYR4,539.29
Eaton NZM Door Coupling Handle for use with N(S)3(-4), NZM3(-4), PN3(-4)
  • RS Stock No. 125-986
  • Mfr. Part No. 172532 NZM3-XTVDKL
Each
MYR1,571.32
ABB Emax2 Electronic Circuit Breaker 4kA Ekip Touch LSIG, 4 channels
  • RS Stock No. 259-3811
  • Mfr. Part No. 1SDA071826R1
Each
MYR119,038.62
Schneider Electric, ComPacT NSX Circuit breaker 1P 63A, Breaking Capacity 25 kA, Busbar System
  • RS Stock No. 654-210
  • Mfr. Part No. IL0631P253
Each
MYR939.89
Schneider Electric Masterpact Spare Parts for use with Masterpact MasterPact MTZ2 Circuit Breaker
  • RS Stock No. 654-175
  • Mfr. Part No. LV834036SP
Each
MYR9,494.45
Schneider Electric Mureva Distribution Board, 90 A
  • RS Stock No. 119-360
  • Mfr. Part No. 13172M
Each
MYR1,511.30
Better World
Siemens SENTRON Electronic Circuit Breaker 500A 3VA, 3 channels
  • RS Stock No. 155-868
  • Mfr. Part No. 3VA2450-7HK32-0AA0
Each
MYR17,497.70
Better World
Schneider Electric, ComPacT New Generation Circuit breaker 3P 63A, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 254-6298
  • Mfr. Part No. C10N3TM063
Each
MYR3,686.99
Hager BFH RCCB, 40A, 4 Pole, 300mA, Type A-HI
  • RS Stock No. 597-991
  • Mfr. Part No. BFH843
Each
MYR2,068.47
Bourns SMD Non Resettable Fuse 30A, 250V ac
  • RS Stock No. 187-8667
  • Mfr. Part No. SF-3812F3000T-2
Each (On a Reel of 2500)
MYR11.904
1
180
2329
Results per page

Related links