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

6 of 999+
RS PRO 15A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 668-6051
Each (In a Pack of 10)
R 7.371(exc. VAT)
Europa Blanking Plate
  • RS stock no. 201-7936
  • Mfr. Part No. ECUBP
1 Pair
R 99.12(exc. VAT)
Siemens SIRIUS 3 Phase Busbar, 690V
  • RS stock no. 218-865
  • Mfr. Part No. 3RV2925-5AB
Each
R 241.76(exc. VAT)
RS PRO 6.3A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-396
Each (In a Pack of 10)
R 6.897(exc. VAT)
Better World
Schneider Electric Acti 9 C60H-DC MCB, 1P, 20A Curve C, 250V DC, 20 kA Breaking Capacity
  • RS stock no. 776-3177
  • Mfr. Part No. A9N61512
Each
R 595.68(exc. VAT)
ETA Thermal Circuit Breaker - 2-5700 Single Pole 250V Voltage Rating Panel Mount, 15A Current Rating
  • RS stock no. 405-9157
  • Mfr. Part No. 2-5700-IG1-P10-DD-000040-15A
Each
R 575.43(exc. VAT)
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)
Eaton 15A F Melamine Cartridge Fuse, 10 x 38mm
  • RS stock no. 851-1674
  • Mfr. Part No. KTK-15
Each
R 654.08(exc. VAT)
Better World
Schneider Electric Acti 9 C60H-DC MCB, 1P, 4A Curve C, 250V DC, 20 kA Breaking Capacity
  • RS stock no. 776-3168
  • Mfr. Part No. A9N61504
Each
R 587.24(exc. VAT)
Siemens Sentron 5SJ6 MCB, 1P, 20A Curve C, 230V AC, 60V DC, 6 kA Breaking Capacity
  • RS stock no. 521-4838
  • Mfr. Part No. 5SJ6120-7KS
Each
R 383.45(exc. VAT)
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)
Eaton 630A Centred Tag Fuse, NH2, 690V
  • RS stock no. 182-1693
  • Mfr. Part No. 170M5812D
Each
R 7,549.51(exc. VAT)
Eaton xEffect MCB, 2P, 20A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS stock no. 847-3311
  • Mfr. Part No. 102211 FAZ-C20/2-RT
Each
R 1,088.62(exc. VAT)
Better World
Siemens SENTRON 5SL60 MCB, 1P + N, 32A Curve C, 230V AC, 60V DC, 6 kA Breaking Capacity
  • RS stock no. 328-548
  • Mfr. Part No. 5SL6032-7KL
Each
R 1,436.34(exc. VAT)
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)
Finder Busbar, 6 A - 250V
  • RS stock no. 776-1531
  • Mfr. Part No. 093.16.1
Each
R 93.06(exc. VAT)
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)
RS PRO 1.5A F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-453
Each (In a Pack of 10)
R 6.648(exc. VAT)
Eaton, Eaton Moeller Series NZM MCCB Molded Case Circuit Breaker 3P 32A, Breaking Capacity 18.5 kA, Fixed Mount
  • RS stock no. 230-938
  • Mfr. Part No. 107775 NZMB2-A32-BT-NA
Each
R 13,106.80(exc. VAT)
Eaton 6A Ceramic Cartridge Fuse, 10 x 38mm
  • RS stock no. 703-8374
  • Mfr. Part No. C10G6
Each (In a Pack of 10)
R 27.082(exc. VAT)
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