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

21 of 999+
ABB Tmax T Motor Operator for use with MCCB
  • RS stock no. 232-0141
  • Mfr. Part No. 1SDA060398R1 MOE 220-250VACDC T6
Each
R 34,781.24(exc. VAT)
RS PRO Industrial Surge Protector, 40kA, 2.8kV, DIN Rail Mount
  • RS stock no. 101-772
Each
R 879.10(exc. VAT)
ABB System Pro M Compact S200L MCB, 2P, 6A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS stock no. 183-3623
  • Mfr. Part No. 2CDS242701R0064
Each
R 937.81(exc. VAT)
Schneider Electric ComPacT NSX Rotary Handle for use with NSX630
  • RS stock no. 272-7477
  • Mfr. Part No. LV432598T
Each
R 4,854.74(exc. VAT)
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 63A Curve C, 100 → 133V AC, 72V DC, 10 kA Breaking Capacity
  • RS stock no. 791-3310
  • Mfr. Part No. A9F54163
Each
R 867.38(exc. VAT)
Better World
Schneider Electric Multi 9 MCB Mini Circuit Breaker, 1P, 6A, Type Z, 277V AC
  • RS stock no. 256-6790
  • Mfr. Part No. M9F44106
Each
R 3,226.22(exc. VAT)
Schurter 20A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS stock no. 144-1826
  • Mfr. Part No. 8020.5024.G
Each (In a Bag of 10)
R 17.559(exc. VAT)
nVent ERICO Earth Bar
  • RS stock no. 277-6234
  • Mfr. Part No. EEB04C506D0A
Each
R 3,628.81(exc. VAT)
Better World
Siemens, SENTRON MCCB 4P 250A, Fixed Mount
  • RS stock no. 210-1692
  • Mfr. Part No. 3VA1225-1AA42-0AA0
Each
R 11,221.19(exc. VAT)
Better World
Schneider Electric Acti9 Acti9 iDT40K MCB, 1+N, 10A Curve C, 230V AC, 4.5 kA Breaking Capacity
  • RS stock no. 238-3411
  • Mfr. Part No. A9P71610
Each
R 675.79(exc. VAT)
SIBA 225A White Automotive Car Fuse, 80V dc
  • RS stock no. 161-1835
  • Mfr. Part No. 9005805.225
Each
R 133.77(exc. VAT)
RS PRO 30A Green Blade Car Fuse, 32V dc
  • RS stock no. 563-447
Each (In a Pack of 10)
R 14.122(exc. VAT)
Schneider Electric Acti 9 IC60a MCB, 2P, 16A, Type AC
  • RS stock no. 209-1310
  • Mfr. Part No. A9F64216
Each
R 1,200.37(exc. VAT)
Eaton 15A Ceramic Cartridge Fuse, 10 x 38mm
  • RS stock no. 703-8239
  • Mfr. Part No. PV-15A10F
Each
R 236.56(exc. VAT)
Better World
Schneider Electric Multi 9 C60SP MCB, 1P, 2A Curve C, 240 → 415V AC, 60V DC, 10 kA Breaking Capacity
  • RS stock no. 219-9114
  • Mfr. Part No. M9F22102
Each
R 713.27(exc. VAT)
Eaton 30A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 480V
  • RS stock no. 225-8215
  • Mfr. Part No. BK-HVP-CC-R
Each (In a Pack of 5)
R 153.042(exc. VAT)
Siemens SENTRON 3 Phase Busbar Connector, 400V
  • RS stock no. 152-507
  • Mfr. Part No. 5ST3613-4
Each
R 378.50(exc. VAT)
RS PRO 20A Inline Fuse Holder for ATO/ATC 19x18.6mm Fuse, 32V dc
  • RS stock no. 237-5263
Each
R 92.45(exc. VAT)
RS PRO 6.3A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS stock no. 911-3473
Each (In a Pack of 10)
R 3.89(exc. VAT)
Eaton 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P, 690V ac
  • RS stock no. 489-4578
  • Mfr. Part No. CHM1DU
Each
R 135.25(exc. VAT)
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