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

46578 Products showing for Fuses & Circuit Breakers

198 / 999+
Littelfuse 500A Base Mount Fuse Holder for Mega Fuse, 1P, 32V dc
  • RS Stock No. 787-4378
  • Mfr. Part No. 02981001ZXT
Each
MYR69.17
Littelfuse SMD Non Resettable Fuse 375mA, 125V
  • RS Stock No. 738-3282P
  • Mfr. Part No. 0466.375NR
Each (Supplied on a Reel)
MYR2.94
WJ Furse Copper Earth Clamp Max. Conductor Size 26 x 8mm
  • RS Stock No. 153-2959
  • Mfr. Part No. 7TCA083610R0002 CN105-H
Each (In a Pack of 10)
MYR103.474
Phoenix Contact 3 Phase Surge Protector, 40kA, 2500V (Volts), DIN Rail Mount
  • RS Stock No. 130-238
  • Mfr. Part No. 2910366
Each
MYR1,307.17
Siemens 125A NH Fuse, NH1, 500V ac
  • RS Stock No. 396-077
  • Mfr. Part No. 3NA3132
Each (In a Pack of 3)
MYR65.537
ABB Emax2 Electronic Circuit Breaker 800A Ekip Touch LI, 3 channels
  • RS Stock No. 259-4023
  • Mfr. Part No. 1SDA072094R1
Each
MYR15,114.22
Wickmann 60A Inline Fuse Holder, 58V dc
  • RS Stock No. 174-0617
  • Mfr. Part No. FHJC1002G
1 Pack of 1
MYR55.19
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 40A Curve C, 440V AC, 180V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-3294
  • Mfr. Part No. A9F87340
Each
MYR1,821.02
Better World
ABB System Pro M Compact S200M MCB, 2P, 40A Curve B, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 132-037
  • Mfr. Part No. 2CDS272001R0405 S202M-B40
Each
MYR356.83
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 1kA, Breaking Capacity 35 kA
  • RS Stock No. 249-234
  • Mfr. Part No. 3VA6610-6HN32-0AA0
Each
MYR38,294.19
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 55 kA
  • RS Stock No. 209-6751
  • Mfr. Part No. 3VA1110-5GE42-0AA0
Each
MYR3,152.27
Better World
Schneider Electric Acti 9 iDPN MCB, 10A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 776-6729
  • Mfr. Part No. A9N21596
Each
MYR906.44
Schurter PC Board Non Resettable Fuse, Radial 400mA, 250V ac
  • RS Stock No. 284-5293
  • Mfr. Part No. 0034.6611
Each (In a Pack of 10)
MYR2.31
20A Tag Fuse, 14 x 50mm, 500V
  • RS Stock No. 252-910
  • Mfr. Part No. 20D16R FUSE 20A DI/E16 GR 500VAC
1 Pack of 10
MYR269.46
ABB MCCB Molded Case Circuit Breaker 4P 320A, Fixed Mount
  • RS Stock No. 250-4066
  • Mfr. Part No. 1SDA054330R1
Each
MYR19,516.18
Better World
ABB System Pro M Compact S200 MCB, 4P, 3A Curve D, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 746-7908
  • Mfr. Part No. 2CDS254001R0031 S204-D3
Each
MYR1,198.36
ABB Shunt Trip Shunt trip for use with Tmax XT1, Tmax XT2, Tmax XT3, Tmax XT4
  • RS Stock No. 192-0919
  • Mfr. Part No. 1SDA066314R1
Each
MYR563.03
Eaton xEffect MCB, 2P, 500mA Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3210
  • Mfr. Part No. 102157 FAZ-C0,5/2-NA
Each
MYR651.76
Schurter 1.6A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 830-4224
  • Mfr. Part No. 8020.5013.G
Each (In a Pack of 10)
MYR3.686
Schneider Electric, ComPacT MCCB 4P 1kA, Breaking Capacity 30 kA, Fixed Mount
  • RS Stock No. 341-501
  • Mfr. Part No. C100N42AFM
Each
MYR62,926.70
1
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