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

12 of 999+
Eaton PKPM2 RCCB, 10A, 2 Pole, 30mA, Type B, 230V
  • RS stock no. 232-022
  • Mfr. Part No. 108105 PKPM2-10/2/B/003-A
Each
R 4,662.35(exc. VAT)
Wickmann 30A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 174-0635
  • Mfr. Part No. 0505030.MXP
Each (In a Pack of 5)
R 120.466(exc. VAT)
RS PRO 2A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 668-6079
Each (In a Pack of 10)
R 2.93(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)
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)
Bourns 1.1A Resettable Fuse, 30V
  • RS stock no. 647-8033
  • Mfr. Part No. MF-SM100-2
Each (In a Pack of 10)
R 5.38(exc. VAT)
Siemens SENTRON Door Feedthrough Accessory for use with 3VF8, Circuit Breaker 3VF7
  • RS stock no. 265-533
  • Mfr. Part No. 8UC7414-1BB44
Each
R 4,971.18(exc. VAT)
Better World
Schneider Electric Acti 9 iC60N MCB, 4P, 63A Curve C, 400V AC, 12 → 250V DC, 6 kA Breaking Capacity
  • RS stock no. 734-9181
  • Mfr. Part No. A9F77463
Each
R 1,513.59(exc. VAT)
Better World
Schneider Electric Acti 9 C120N MCB, 3P, 100A Curve C, 440V AC, 375V DC, 10 kA, 20 kA Breaking Capacity
  • RS stock no. 776-3073
  • Mfr. Part No. A9N18367
Each
R 6,668.73(exc. VAT)
Littelfuse 20A Yellow Blade Car Fuse, 32V dc
  • RS stock no. 337-4023
  • Mfr. Part No. 0299020.TXN
Each (In a Pack of 10)
R 53.937(exc. VAT)
Schneider Electric Acti 9 iC60H MCB, 1P, 10A Curve C, 230V AC, 72V DC, 10 kA Breaking Capacity
  • RS stock no. 776-8781
  • Mfr. Part No. A9F84110
Each
R 143.67(exc. VAT)
ETI 6A DII Diazed Fuse, E27 Thread Size, gG - gL, 500V ac
  • RS stock no. 413-642
  • Mfr. Part No. 2312403
Each (In a Pack of 5)
R 35.668(exc. VAT)
ETA Thermal Circuit Breaker - 1616 Single Pole 32V Voltage Rating, 30A Current Rating
  • RS stock no. 729-2748
  • Mfr. Part No. 1616-21-30A
Each
R 275.80(exc. VAT)
Better World
Schneider Electric Multi 9 N40N MCB, 1P, 6A Curve C, 10 kA Breaking Capacity
  • RS stock no. 214-2092
  • Mfr. Part No. M9P22606
Each
R 1,225.24(exc. VAT)
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)
Better World
Siemens 5sV3 RCCB, 63A, 2 Pole, 30mA, Type A, 230V ac
  • RS stock no. 211-9633
  • Mfr. Part No. 5SV3316-6
Each
R 5,141.84(exc. VAT)
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)
RS PRO 1.6A T Glass Cartridge Fuse, 5 x 20mm
  • RS stock no. 610-9951
Each (In a Pack of 10)
R 9.739(exc. VAT)
RS PRO 5A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 911-3506
Each (In a Pack of 10)
R 8.555(exc. VAT)
ABB 32A Fuse Holder for 10 x 38mm Fuse, 2P, 400V
  • RS stock no. 289-1624
  • Mfr. Part No. 2CSM264383R1801
Each
R 168.79(exc. VAT)
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