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

241 / 999+
Better World
Siemens Sentron 5SY4 MCB, 2P, 6A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1290
  • Mfr. Part No. 5SY4206-8
Each
MYR494.10
Siemens 40A Tag Fuse, NH1, 400V ac
  • RS Stock No. 143-909
  • Mfr. Part No. 3NA6117-4
1 Pack of 3
MYR240.93
Mersen 500mA FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 188-6726
  • Mfr. Part No. J084303
Each (In a Pack of 10)
MYR22.31
Schneider Electric, ComPacT MCCB 1P 16A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 341-502
  • Mfr. Part No. C10F1TM016
Each
MYR2,539.26
ABB RCBO, 40A Current Rating, 3P Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 767-4434
  • Mfr. Part No. 2CSR273001R1405 DS203 M AC-B40/0,03
Each
MYR1,147.08
Bourns 12A F Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 254-4178
  • Mfr. Part No. PF-HT1-12
Each (In a Box of 50)
MYR102.029
Better World
Siemens Sentron 5SY7 MCB, 1P, 10A Curve C, 230V AC, 15 kA Breaking Capacity
  • RS Stock No. 622-0222
  • Mfr. Part No. 5SY7110-7
Each
MYR144.93
Schneider Electric Acti9 A9F MCB, 2P, 63A Curve C, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 288-7098
  • Mfr. Part No. A9F94263
Each
MYR2,280.54
Eaton NZM Handle for use with NS3…-NA, NZM3…-NA
  • RS Stock No. 120-816
  • Mfr. Part No. 155502 NZM3-XSH-4X-84-NA
Each
MYR6,080.61
Littelfuse 10A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 769-0079
  • Mfr. Part No. 0314010.HXP
Each (In a Pack of 10)
MYR4.912
Schneider Electric, Compact MCCB 3P 630A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 354-471
  • Mfr. Part No. C063L3FM
Each
MYR15,410.02
Littelfuse 400mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4331
  • Mfr. Part No. 0217.400MXP
Each (In a Pack of 10)
MYR1.274
Wickmann Non-Resettable Wire Ended Fuse 1A, 250V ac
  • RS Stock No. 174-0650
  • Mfr. Part No. 0875001.MXEP
Each (In a Pack of 10)
MYR10.488
Schneider Electric, PowerPact Circuit breaker 2P 50A, Breaking Capacity 18 kA, Clip-On
  • RS Stock No. 339-331
  • Mfr. Part No. BDL26050LU
Each
MYR1,703.15
Schurter 30A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 703-2657P
  • Mfr. Part No. 8020.0607.PT
Each (Supplied in a Bag)
MYR5.698
Schurter SMD Non Resettable Fuse 2.5A, 125V ac/dc
  • RS Stock No. 188-4600
  • Mfr. Part No. 3-103-118
Each (On a Tape of 5)
MYR18.068
Better World
ABB System Pro M Compact S200 MCB, 2P, 10A Curve B, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 746-7567
  • Mfr. Part No. 2CDS252001R0105 S202-B10
Each
MYR282.19
Better World
Schneider Electric Acti 9 IDT40T XA MCB, 1P, 16A Curve C, 230V AC, 7.5 kA Breaking Capacity
  • RS Stock No. 200-6169
  • Mfr. Part No. A9PA2616
Each
MYR263.15
Eaton 100A Slow-Blow Cartridge Fuse, 22.2 x 58mm
  • RS Stock No. 228-849
  • Mfr. Part No. C22M100 CYLINDRICAL FUSE 22 x 58 100A AM 500V AC
1 Pack of 10
MYR238.83
Better World
Siemens SENTRON 5SL6 MCB, 3P, 32A Curve B, 6 kA Breaking Capacity
  • RS Stock No. 202-7049
  • Mfr. Part No. 5SL6332-6
Each
MYR390.24
1
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