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

46578 Products showing for Fuses & Circuit Breakers

239 / 999+
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Hi-Touch LSI, 4 channels
  • RS Stock No. 259-4657
  • Mfr. Part No. 1SDA072929R1
Each
MYR62,632.54
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Touch LI, 4 channels
  • RS Stock No. 259-3461
  • Mfr. Part No. 1SDA071414R1
Each
MYR29,558.75
In Stock
Eaton PC Board Non Resettable Fuse, Radial 5A, 125V ac
  • RS Stock No. 852-7203
  • Mfr. Part No. PCD-5-R
Each
MYR39.08
Temporarily out of stock
Better World
ABB System Pro M Compact S200 MCB, 3P, 500mA Curve D
  • RS Stock No. 237-3250
  • Mfr. Part No. 2CDS253001R0981 S203 D 0.5A - 10 KA
Each
MYR462.97
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 4A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3338
  • Mfr. Part No. A9F54204
Each
MYR391.50
In Stock
Schneider Electric 240 → 440V ac Earth Leakage Add-on Protection Module Circuit Trip for use with ComPacT
  • RS Stock No. 130-910
  • Mfr. Part No. LV432464
Each
MYR11,837.15
Limited stock
Better World
Schneider Electric 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 3P+N, 690V ac
  • RS Stock No. 482-843
  • Mfr. Part No. DF103N
Each
MYR280.36
Temporarily out of stock
Schneider Electric Adapter for use with Compact INS, Compact INV, ComPact NS630b → 1600 Circuit Breaker,
  • RS Stock No. 247-1853
  • Mfr. Part No. 33644
Each
MYR1,847.59
Temporarily out of stock
ABB, SACE FORMULA MCCB Molded Case Circuit Breaker 1P 20A, Fixed Mount
  • RS Stock No. 231-9291
  • Mfr. Part No. 1SDA066686R1 / A1N 125 TMF 20-400 1p F F
Each
MYR696.48
Temporarily out of stock
Schneider Electric Acti9 1 Phase Distribution Board, 16 Way
  • RS Stock No. 339-832
  • Mfr. Part No. SEA9DE32
Each
MYR1,044.53
In Stock
ABB System Pro M Compact SD200 MCB, 4P, 63A, 440V AC, 25 kA Breaking Capacity
  • RS Stock No. 189-5650
  • Mfr. Part No. 2CDD284101R0063
Each
MYR566.54
In Stock
Better World
Siemens SENTRON Cover for use with 3VA1 250
  • RS Stock No. 210-9318
  • Mfr. Part No. 3VA9211-0WF40
Each
MYR247.68
Temporarily out of stock
Allen Bradley 140G Shunt Trip Voltage Release for use with Circuit Breaker
  • RS Stock No. 255-1644
  • Mfr. Part No. 140G-G-SNA
Each
MYR822.70
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 250A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 210-1693
  • Mfr. Part No. 3VA1225-5EF42-0AA0
Each
MYR6,597.06
In Stock
Better World
Siemens Sentron 5SY4 MCB, 1+N, 3A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 124-3214
  • Mfr. Part No. 5SY4503-7
Each
MYR448.04
Stock information currently inaccessible
MEAN WELL Surge Protector, 10kA, 320V (Volts), Panel Mount Mount
  • RS Stock No. 145-107
  • Mfr. Part No. SPD-10-320S
Each
MYR59.59
Temporarily out of stock
Schneider Electric Flexible Busbar Trunking, 0.5 → 1.9m, 400A, Canalis Series
  • RS Stock No. 119-366
  • Mfr. Part No. KSA400ET43A
Each
MYR16,403.79
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 4 channels
  • RS Stock No. 259-4549
  • Mfr. Part No. 1SDA072788R1
Each
MYR52,612.76
In Stock
Schurter 8A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 173-7964
  • Mfr. Part No. 0090.0008
Each (In a Box of 10)
MYR85.738
In Stock
Better World
Schneider Electric Acti 9 Acti9 iDT40K MCB, 1+N, 20A Curve C, 230V AC
  • RS Stock No. 238-3413
  • Mfr. Part No. A9P71620
Each
MYR187.56
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