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

2 of 999+
Temporarily out of stock
200A Tag Fuse, 415V ac
  • RS stock no. 252-960
  • Mfr. Part No. 200MJ29-6
1 Pack of 5
R 4,669.60(exc. VAT)
In Stock
RS PRO Residential RCCBs, 40A, 2 Pole, 300mA, Type A, 230V
  • RS stock no. 284-2370
Each
R 1,488.60(exc. VAT)
In Stock
Eaton 16A Panel Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS stock no. 852-6923
  • Mfr. Part No. HTB-34M-R
Each
R 35.35(exc. VAT)
In Stock
RS PRO MCB, 1P, 2A Curve C, 240 → 415V AC, 6 kA Breaking Capacity
  • RS stock no. 265-0190
Each
R 220.05(exc. VAT)
In Stock
Altech 2A T Ceramic Cartridge Fuse, 10 x 38mm
  • RS stock no. 899-3014
  • Mfr. Part No. 2C10X38GI
Each (In a Pack of 10)
R 77.089(exc. VAT)
In Stock
TE Connectivity Thermal Circuit Breaker - W54 Single Pole 250V ac Voltage Rating, 20A Current Rating
  • RS stock no. 782-7988
  • Mfr. Part No. W54-XB1A4A10-20
Each
R 97.05(exc. VAT)
In Stock
RS PRO 4A T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 668-6001
Each (In a Pack of 10)
R 2.197(exc. VAT)
In Stock
RS PRO 30A Inline Fuse Holder for ATO/ATC 19x18.6mm Fuse, 32V dc
  • RS stock no. 237-5265
Each
R 84.74(exc. VAT)
In Stock
ETA Thermal Circuit Breaker - 1658 Single Pole 250V Voltage Rating Panel Mount, 16A Current Rating
  • RS stock no. 344-5333
  • Mfr. Part No. 1658-G21-02-P10-16A
Each
R 123.34(exc. VAT)
In Stock
Eaton 440mA F Melamine Cartridge Fuse, 10 x 35mm
  • RS stock no. 459-7918
  • Mfr. Part No. DMM-B-44-100-R
Each (In a Pack of 5)
R 457.828(exc. VAT)
In Stock
TE Connectivity Thermal Circuit Breaker - W58 Single Pole 50 V dc, 250V ac Voltage Rating, 30A Current Rating
  • RS stock no. 782-0918
  • Mfr. Part No. W58-XB1A4A-30
Each
R 234.72(exc. VAT)
Being discontinued
RS PRO 10A T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-334
Each (In a Pack of 10)
R 17.46(exc. VAT)
Being discontinued
RS PRO 5A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 668-6045
Each (In a Pack of 10)
R 2.062(exc. VAT)
In Stock
RS PRO 500mA F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 209-9276
Each (In a Pack of 10)
R 24.303(exc. VAT)
In Stock
Littelfuse 125A Pink BF1 Car Fuse, 32V dc
  • RS stock no. 431-6753
  • Mfr. Part No. 153.5631.6121
Each (In a Pack of 5)
R 77.062(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 63A Curve B, 100 → 133V AC, 72V DC, 10 kA Breaking Capacity
  • RS stock no. 791-3186
  • Mfr. Part No. A9F53163
Each
R 851.92(exc. VAT)
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60N MCB, 1P, 20A Curve C, 240V AC, 72V DC, 10 kA Breaking Capacity
  • RS stock no. 776-3458
  • Mfr. Part No. A9F77120
Each
R 272.22(exc. VAT)
In Stock
ETA Thermal Circuit Breaker - 1658 Single Pole 250V Voltage Rating Panel Mount, 5A Current Rating
  • RS stock no. 273-0854
  • Mfr. Part No. 1658-G21-02-P10-5A
Each
R 123.64(exc. VAT)
In Stock
Wickmann Fuse Holder Battery Clamp
  • RS stock no. 342-0205
  • Mfr. Part No. 255.1000.0001
Each
R 532.07(exc. VAT)
In Stock
Eaton 315A British Standard Fuse, 415V, 82mm
  • RS stock no. 181-8848
  • Mfr. Part No. 315MJ30-7
Each
R 1,309.85(exc. VAT)
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