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

50687 Products showing for Fuses & Circuit Breakers

20 of 999+
In Stock
Eaton 10A British Standard Fuse, F1, 550V ac
  • RS stock no. 413-490
  • Mfr. Part No. NSD10
Each (In a Pack of 5)
R 219.954(exc. VAT)
In Stock
Littelfuse 30A Inline Fuse Holder for ATO Fuse, 32V dc
  • RS stock no. 337-5234
  • Mfr. Part No. FHAC0002LXN
Each (In a Pack of 5)
R 128.074(exc. VAT)
In Stock
WJ Furse Copper Earth Bar L. 400mm x W. 90mm x H. 90mm 6 Ways
  • RS stock no. 124-2496
  • Mfr. Part No. 7TCA083670R0739 LK245-6
Each
R 4,531.37(exc. VAT)
In Stock
Better World
Siemens 5SV3 RCCB, 40A, 2 Pole, 30mA, Type A
  • RS stock no. 124-7729
  • Mfr. Part No. 5SV3314-6
Each
R 1,559.10(exc. VAT)
In Stock
Eaton 40A Bolted Tag Fuse, 500 V dc, 690V ac, 63.5mm
  • RS stock no. 182-1701
  • Mfr. Part No. 40ET
Each
R 447.34(exc. VAT)
Currently unavailable
Schneider Electric Acti 9 IC60a MCB, 2P, 16A, Type AC
  • RS stock no. 209-1310
  • Mfr. Part No. A9F64216
Each
R 1,200.37(exc. VAT)
In Stock
RS PRO 4A Pink Blade Car Fuse, 32V dc
  • RS stock no. 563-788
Each (In a Pack of 10)
R 10.53(exc. VAT)
In Stock
Siemens SENTRON Auxiliary Switch Kit for use with 3VA1 and 3VA20 up → 3VA25
  • RS stock no. 210-9426
  • Mfr. Part No. 3VA9988-0AA13
Each
R 681.67(exc. VAT)
In Stock
ABB Tmax XT Rod for use with Circuit Breaker
  • RS stock no. 232-0193
  • Mfr. Part No. 1SDA066576R1 RHE_S XT1..4 500MM
Each
R 481.87(exc. VAT)
In Stock
Littelfuse 2A Resettable Fuse, 15V dc
  • RS stock no. 895-1640
  • Mfr. Part No. 2920L200DR
Each (In a Pack of 10)
R 15.266(exc. VAT)
In Stock
RS PRO Three Phase Industrial Surge Protector, 40kA, 1.35kV, DIN Rail Mount
  • RS stock no. 101-792
Each
R 9,350.49(exc. VAT)
Limited stock
Limitor Thermal Fuse +130°C 5 A, 250V ac
  • RS stock no. 124-5061
  • Mfr. Part No. A4-5AF
Each (In a Pack of 5)
R 22.148(exc. VAT)
In Stock
Bulgin 10A Inline Fuse Holder for 5 x 20mm Fuse, 250V
  • RS stock no. 208-8269
  • Mfr. Part No. FX0380/BK
Each (In a Pack of 2)
R 135.945(exc. VAT)
In Stock
Littelfuse 60A Inline Fuse Holder for Maxi Fuse, 32V dc
  • RS stock no. 787-4388
  • Mfr. Part No. MAHC0001ZXJ
Each
R 557.10(exc. VAT)
Temporarily out of stock
Eaton 40A DIII Bottle Fuse, 500V
  • RS stock no. 228-748
  • Mfr. Part No. 40D33
1 Pack of 5
R 243.55(exc. VAT)
In Stock
Keystone 30A PCB Mount Fuse Holder for 5.2 x 0.64mm Fuse, 500V ac
  • RS stock no. 160-3385
  • Mfr. Part No. 3522
Each (In a Pack of 100)
R 3.967(exc. VAT)
In Stock
Better World
Schneider Electric ComPact NSX Snap In Nut for use with Compact NSX 160/250
  • RS stock no. 219-9368
  • Mfr. Part No. LV430554
Each
R 1,221.04(exc. VAT)
In Stock
Better World
Schneider Electric PrismaSeT Front Plate for use with PrismaSeT
  • RS stock no. 272-7482
  • Mfr. Part No. LVS03204
Each
R 511.29(exc. VAT)
In Stock
Better World
Schneider Electric, ComPacT NSX MCCB 4P 160A, Fixed Mount
  • RS stock no. 254-6341
  • Mfr. Part No. C16B42D160
Each
R 21,139.05(exc. VAT)
In Stock
Eaton 6.3A Panel Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS stock no. 310-9841
  • Mfr. Part No. HTC-30M
Each (In a Pack of 5)
R 53.278(exc. VAT)
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