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

34912 Products showing for Fuses & Circuit Breakers

46 of 999+
In Stock
Littelfuse 20A Yellow Blade Car Fuse, 32V dc
  • RS Stock No. 787-4151
  • Mfr. Part No. 0297020.WXNV
Each (In a Pack of 10)
$0.547(exc. VAT)
In Stock
Littelfuse 3A F Glass Cartridge Fuse, 5 x 15mm
  • RS Stock No. 878-3573
  • Mfr. Part No. 0225003.HXP
Each (In a Pack of 50)
$3.522(exc. VAT)
In Stock
Littelfuse 40A Orange Blade Car Fuse, 32V dc
  • RS Stock No. 787-4145
  • Mfr. Part No. 0287040.PXCN
Each (In a Pack of 10)
$0.685(exc. VAT)
In Stock
Better World
ABB System Pro M Compact S200M MCB, 2P, 16A Curve C, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 132-122
  • Mfr. Part No. 2CDS272001R0164 S202M-C16
Each
$119.06(exc. VAT)
In Stock
Siemens SIRIUS 3 Phase Busbar, 690V, 45mm Pitch
  • RS Stock No. 246-5140
  • Mfr. Part No. 3RV1915-1CB
Each
$81.70(exc. VAT)
In Stock
Schurter T12 Series Circuit Breaker Cover for 5 x 20mm Fuse, IP54
  • RS Stock No. 284-6230
  • Mfr. Part No. 4400.0405
Each
$12.61(exc. VAT)
In Stock
Littelfuse 8A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4555
  • Mfr. Part No. 0216008.MXP
Each (In a Pack of 10)
$2.278(exc. VAT)
Limited stock
Littelfuse 2A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4684
  • Mfr. Part No. 0215002.MXP
Each (In a Pack of 10)
$3.049(exc. VAT)
In Stock
ABB 20A Fuse Holder for 8.5 x 31.5mm Fuse, 2P, 400V
  • RS Stock No. 289-1623
  • Mfr. Part No. 2CSM264353R1801
Each
$18.38(exc. VAT)
Being discontinued
RS PRO PC Board Non Resettable Fuse, Axial 1A, 125V ac/dc
  • RS Stock No. 764-9469
Each (In a Pack of 10)
$0.809(exc. VAT)
Temporarily out of stock
Schneider Electric Compact NSX Toggle Extention for use with Compact NSX100
  • RS Stock No. 347-002
  • Mfr. Part No. LV429313T
Each
$265.06(exc. VAT)
In Stock
ABB System M Pro S200 MCB, 3P, 16A Curve B, 400V AC, 12V DC, 10 kA Breaking Capacity
  • RS Stock No. 288-0884
  • Mfr. Part No. 2CDS253001R0165
Each
$191.59(exc. VAT)
Temporarily out of stock
ABB RCBO, 20A Current Rating, 1P+N Poles, 300mA Trip Sensitivity, Type C
  • RS Stock No. 183-3707
  • Mfr. Part No. 2CSR245041R3204
Each
$215.38(exc. VAT)
In Stock
ABB High Performance S800N MCB, 3P, 100A Curve B, 400V AC, 36 kA Breaking Capacity
  • RS Stock No. 435-370
  • Mfr. Part No. 2CCG001221R0001
Each
$467.64(exc. VAT)
In Stock
Schurter 1A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 830-4212
  • Mfr. Part No. 8020.5011.G
Each (In a Pack of 10)
$2.074(exc. VAT)
Temporarily out of stock
Schneider Electric, ComPact MCCB Molded Case Circuit Breaker 3P 250A, Fixed Mount
  • RS Stock No. 230-6793
  • Mfr. Part No. LV431390
Each
$790.17(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 6A Curve C, 100 → 133V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3290
  • Mfr. Part No. A9F54106
Each
$58.20(exc. VAT)
In Stock
Mersen 2A Time Lag Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 630-842
  • Mfr. Part No. Z085375Q
1 Box of 10
$32.98(exc. VAT)
Being discontinued
RS PRO PC Board Non Resettable Fuse, Axial 1A, 250V ac
  • RS Stock No. 764-9589
Each (In a Pack of 10)
$1.716(exc. VAT)
In Stock
Eaton 40A British Standard Fuse, A3, 550V ac, 73.5mm
  • RS Stock No. 415-317
  • Mfr. Part No. BAO40
Each
$22.23(exc. VAT)
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