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

50690 Products showing for Fuses & Circuit Breakers

10 of 999+
In Stock
Eaton 6A British Standard Fuse, F1, 550V ac
  • RS stock no. 413-484
  • Mfr. Part No. NSD6
Each (In a Pack of 5)
R 186.596(exc. VAT)
In Stock
Littelfuse 125A Green Bolt Down Car Fuse, 32V dc
  • RS stock no. 787-4413
  • Mfr. Part No. 0298125.ZXEH
Each
R 139.41(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 20A Curve C, 100 → 133V AC, 72V DC, 10 kA Breaking Capacity
  • RS stock no. 791-3307
  • Mfr. Part No. A9F54120
Each
R 622.30(exc. VAT)
In Stock
Better World
Siemens Sentron 5SY6 MCB, 2P, 6A Curve C, 400V AC, 72V DC, 6 kA Breaking Capacity
  • RS stock no. 196-3628
  • Mfr. Part No. 5SY6206-7
Each
R 1,188.07(exc. VAT)
In Stock
Better World
Siemens Sentron 5SY4 MCB, 2P, 4A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS stock no. 772-1284
  • Mfr. Part No. 5SY4204-8
Each
R 1,662.51(exc. VAT)
Temporarily out of stock
Hager NEN MCB, 1P, 6A, 230V AC, 10 kA Breaking Capacity
  • RS stock no. 602-147
  • Mfr. Part No. NEN106
Each
R 1,263.19(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)
Being discontinued
RS PRO 10A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 668-6057
Each (In a Pack of 10)
R 1.808(exc. VAT)
In Stock
RS PRO 5A Tan Blade Car Fuse, 32V dc
  • RS stock no. 563-536
Each (In a Pack of 10)
R 14.122(exc. VAT)
In Stock
ETA Thermal Circuit Breaker - EM12-T 24V Voltage Rating DIN Rail Mount, 40A Current Rating
  • RS stock no. 175-0362
  • Mfr. Part No. EM12-T01-001-DC24V-40A
Each
R 836.19(exc. VAT)
In Stock
RS PRO 3.5A T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 911-3417
Each (In a Pack of 10)
R 8.502(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 3P, 63A Curve C, 100 → 130V AC, 12 → 144V DC, 6 kA Breaking Capacity
  • RS stock no. 734-9270
  • Mfr. Part No. A9F77363
Each
R 1,393.90(exc. VAT)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 6A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS stock no. 791-3385
  • Mfr. Part No. A9F54306
Each
R 2,992.97(exc. VAT)
Last RS stock
TE Connectivity Thermal Circuit Breaker - W57 Single Pole 250V ac Voltage Rating, 10A Current Rating
  • RS stock no. 782-0867
  • Mfr. Part No. W57-XB7A4A10-10
Each
R 88.65(exc. VAT)
In Stock
Eaton 2A British Standard Fuse, F1, 550V ac
  • RS stock no. 413-462
  • Mfr. Part No. NSD2
Each (In a Pack of 5)
R 118.786(exc. VAT)
In Stock
RS PRO RC Suppressor Circuit for use with Contactors
  • RS stock no. 277-8524
Each
R 316.50(exc. VAT)
Temporarily out of stock
Eaton Eaton Distribution Parts 1 Phase Busbar, 415V, 17.8mm Pitch
  • RS stock no. 259-043
  • Mfr. Part No. 270339 Z-GV-10/1P-1TE
Each
R 423.71(exc. VAT)
In Stock
RS PRO 500mA T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 668-5985
Each (In a Pack of 10)
R 7.219(exc. VAT)
In Stock
Better World
Schneider Electric Multi 9 MCB, 1P, 16A Curve C, 10 kA Breaking Capacity
  • RS stock no. 219-9120
  • Mfr. Part No. M9F22116
Each
R 703.36(exc. VAT)
In Stock
ABB 12 Way Plastic Consumer Unit, 63A, IP65 Mistral65
  • RS stock no. 183-3758
  • Mfr. Part No. 1SLM006500A2212
Each
R 983.17(exc. VAT)
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