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

50713 Products showing for Fuses & Circuit Breakers

1 of 999+
ETA Thermal Circuit Breaker - 4130 Single Pole 240V Voltage Rating Panel Mount, 60A Current Rating
  • RS stock no. 405-9258
  • Mfr. Part No. 4130-G211-K4M1-60A
Each
R 915.90(exc. VAT)
Better World
Schneider Electric Acti 9 iC60N MCB, 2P, 10A Curve C, 400V AC, 12 → 144V DC, 6 kA Breaking Capacity
  • RS stock no. 734-9068
  • Mfr. Part No. A9F77210
Each
R 905.87(exc. VAT)
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 1A Curve C, 100 → 133V AC, 72V DC, 10 kA Breaking Capacity
  • RS stock no. 791-3275
  • Mfr. Part No. A9F54101
Each
R 554.65(exc. VAT)
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)
RS PRO Residential RCCBs, 40A, 2 Pole, 300mA, Type A, 230V
  • RS stock no. 284-2370
Each
R 1,488.60(exc. VAT)
ETA Thermal Circuit Breaker - 1658 Single Pole 250V Voltage Rating Panel Mount, 6A Current Rating
  • RS stock no. 344-5327
  • Mfr. Part No. 1658-G21-02-P10-6A
Each
R 123.34(exc. VAT)
Eaton 250A Tag Fuse, 415V ac
  • RS stock no. 255-494
  • Mfr. Part No. 250MJ29-6
1 Pack of 5
R 4,699.05(exc. VAT)
Mersen 150A British Standard Fuse, 17 x 27mm, 250V ac, 38 → 42.8mm
  • RS stock no. 304-2704
  • Mfr. Part No. W085556
Each
R 613.72(exc. VAT)
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)
Eaton 160A Tag Fuse, 31 x 110mm, 415V, 82mm
  • RS stock no. 240-192
  • Mfr. Part No. 160MJ30-7 160A 415V AC TYPE J F/PILLAR FUSE
1 Pack of 10
R 5,776.52(exc. VAT)
Eaton 160A Centred Tag Fuse, NH00, 500V ac
  • RS stock no. 703-8664
  • Mfr. Part No. 160NHG00B
Each
R 178.53(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)
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)
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)
RS PRO MCB, 1P, 6A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS stock no. 265-0204
Each
R 221.42(exc. VAT)
RS PRO 32A British Standard Fuse, A2, 550V ac, 73mm
  • RS stock no. 521-2624
Each (In a Pack of 5)
R 121.394(exc. VAT)
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)
800A Ceramic Cartridge Fuse, 130 x 220mm
  • RS stock no. 262-651
  • Mfr. Part No. 800NHG4G NH4 FUSE 500V 800A AG
Each
R 3,469.68(exc. VAT)
Better World
Schneider Electric Acti 9 iC60N MCB, 2P, 32A Curve C, 400V AC, 12 → 144V DC, 6 kA Breaking Capacity
  • RS stock no. 734-9147
  • Mfr. Part No. A9F77232
Each
R 1,037.28(exc. VAT)
RS PRO 1A F Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 563-380
Each (In a Pack of 10)
R 4.105(exc. VAT)
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