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
Fuses - PCB
Fuses - PCB

46578 Products showing for Fuses & Circuit Breakers

228 / 999+
RS PRO 63A Rail Mount Fuse Holder for F2 Fuse, 415V ac
  • RS Stock No. 216-5351
Each
MYR113.28
ABB Emax2 Electronic Circuit Breaker 2.5kA 1SDA07, 3 channels
  • RS Stock No. 259-4323
  • Mfr. Part No. 1SDA072477R1
Each
MYR104,542.06
Better World
Schneider Electric Acti 9 Acti9 iDT40T MCB, 3P, 6A Curve D, 400V AC
  • RS Stock No. 238-3382
  • Mfr. Part No. A9P32306
Each
MYR1,054.93
Better World
Siemens Sentron 5SY6 MCB, 1P, 20A Curve B, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 489-6681
  • Mfr. Part No. 5SY6120-6
Each
MYR100.21
Better World
ABB System Pro M Compact S200 MCB, 1P, 2A Curve C, 230V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 746-7649
  • Mfr. Part No. 2CDS251001R0024 S201-C2
Each
MYR160.84
Siemens, SENTRON MCCB 4P 250A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-858
  • Mfr. Part No. 3VA5225-7ED41-0AA0
Each
MYR12,276.62
Better World
Siemens, SENTRON MCCB 4P 800A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 209-5258
  • Mfr. Part No. 3VA2580-5HN42-0AA0
Each
MYR19,639.58
Siemens Fuse Holder Adapter Sleeve
  • RS Stock No. 202-7150
  • Mfr. Part No. 5SH5025
Each (In a Pack of 50)
MYR4.54
WR-FSH Fuseholder Clip Black SMT 5x20mm
  • RS Stock No. 563-074P
  • Mfr. Part No. 696103201002
Each (Supplied in a Box)
MYR55.15
Siemens 80A Centred Tag Fuse, NH00, 690V ac
  • RS Stock No. 203-2032
  • Mfr. Part No. 3NA3824-6
Each (In a Pack of 3)
MYR230.827
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Dip LSI, 4 channels
  • RS Stock No. 259-4525
  • Mfr. Part No. 1SDA072763R1
Each
MYR26,019.47
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 4 channels
  • RS Stock No. 259-4603
  • Mfr. Part No. 1SDA072867R1
Each
MYR62,178.72
Better World
Siemens RCBO, 6A Current Rating, 2P Poles, 300mA Trip Sensitivity, Sentron Range
  • RS Stock No. 225-8831
  • Mfr. Part No. 5SV1616-7KK06
Each
MYR659.23
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 40A, Breaking Capacity 2.5 kA
  • RS Stock No. 245-779
  • Mfr. Part No. 3VA6140-8HN31-0AA0
Each
MYR6,789.75
ABB PS1 3 Phase Busbar, 690V ac, 17.5mm Pitch
  • RS Stock No. 711-6519
  • Mfr. Part No. 1SAM201906R1115 PS1-5-1-65
Each
MYR117.80
ABB High Performance S800C MCB, 4P, 32A Curve C, 400 V, 415 V AC, 25 kA Breaking Capacity
  • RS Stock No. 225-5969
  • Mfr. Part No. 2CCS884001R0324 S804C C 32A - 25 KA
Each
MYR903.85
Eaton 40A Ceramic Cartridge Fuse, 23 x 57mm
  • RS Stock No. 182-1692
  • Mfr. Part No. 40KR85
Each
MYR46.31
Better World
ABB Emax2 Electronic Circuit Breaker 3.2kA Ekip G Touch LSIG, 3 channels
  • RS Stock No. 259-3249
  • Mfr. Part No. 1SDA071147R1
Each
MYR82,704.55
Littelfuse 6A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 738-3129
  • Mfr. Part No. 0KLK006.T
Each
MYR165.52
ABB MCCB Molded Case Circuit Breaker 3P 630A, Fixed Mount
  • RS Stock No. 250-4153
  • Mfr. Part No. 1SDA054423R1
Each
MYR25,987.03
1
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