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

252 / 999+
ABB SMISSLINE TP S400M MCB, 3P, 16A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 176-661
  • Mfr. Part No. 2CCS573001R0164 S403M-C16
Each
MYR656.77
Eaton 600A Tag Fuse, 60mm, 1kV
  • RS Stock No. 282-6206
  • Mfr. Part No. FWE-600A
Each
MYR2,848.78
Allen Bradley, 140G MCCB 3P 125A, Module Frame Mount
  • RS Stock No. 261-2856
  • Mfr. Part No. 140G-G6C3-C50
Each
MYR2,369.71
Siemens 250A Centred Tag Fuse, NH3, 500V ac
  • RS Stock No. 203-2000
  • Mfr. Part No. 3NA3344
Each (In a Pack of 3)
MYR223.95
Lovato 2 Phase Surge Protector, 50kA
  • RS Stock No. 216-8299
  • Mfr. Part No. SG22PA300
Each
MYR1,042.34
Littelfuse Non-Resettable Wire Ended Fuse 750mA, 125V ac/dc
  • RS Stock No. 738-3052
  • Mfr. Part No. 0251.750MRT1L
Each (In a Pack of 10)
MYR2.752
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip G Touch LSIG, 4 channels
  • RS Stock No. 259-3490
  • Mfr. Part No. 1SDA071457R1
Each
MYR50,699.57
ABB F200 RCCB, 40A, 4 Pole, 500mA, Type A, 230V ac
  • RS Stock No. 225-6139
  • Mfr. Part No. 2CSF204123R4400 F204 A-40/0.5
Each
MYR1,246.41
ABB MCCB Molded Case Circuit Breaker 3P 400A, Fixed Mount
  • RS Stock No. 250-4114
  • Mfr. Part No. 1SDA054381R1
Each
MYR19,185.41
Eaton 10A PCB Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 169-9385
  • Mfr. Part No. HTC-50M
1 Bag of 1000
MYR17,592.64
Better World
Siemens SENTRON Electronic Circuit Breaker 250A 3VA2, 3 channels
  • RS Stock No. 156-810
  • Mfr. Part No. 3VA2225-8HN32-0AA0
Each
MYR11,954.95
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Dip LI, 3 channels
  • RS Stock No. 259-4165
  • Mfr. Part No. 1SDA072281R1
Each
MYR30,851.61
Bourns 0.1A Resettable Fuse, 60V
  • RS Stock No. 647-8415
  • Mfr. Part No. MF-R010
Each (In a Pack of 10)
MYR2.138
Hager NSN MCB, 2P, 32A Curve D, 415V AC, 20 kA Breaking Capacity
  • RS Stock No. 597-955
  • Mfr. Part No. NSN232
Each
MYR1,026.65
Eaton RCBO, 16A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type A, Type D, FRBdM Range
  • RS Stock No. 121-020
  • Mfr. Part No. 168276 FRBDM-D16/1N/003-G/A
Each
MYR863.12
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 2A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3372
  • Mfr. Part No. A9F54302
Each
MYR1,084.41
ABB Emax2 Electronic Circuit Breaker 4kA Ekip Dip LI, 3 channels
  • RS Stock No. 259-4380
  • Mfr. Part No. 1SDA072561R1
Each
MYR124,428.28
Better World
Siemens SENTRON 5SY5 MCB, 2P, 25A Curve C, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 212-8890
  • Mfr. Part No. 5SY5225-7
Each
MYR781.62
Schneider Electric, ComPacT MCCB 3P 32A, Fixed Mount
  • RS Stock No. 260-9464
  • Mfr. Part No. C10H3TM032
Each
MYR3,591.27
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 800A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 250-158
  • Mfr. Part No. 3VA6580-6KT32-0AA0
Each
MYR37,316.47
1
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