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

46580 Products showing for Fuses & Circuit Breakers

14 / 999+
RS PRO 6A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 177-8113
Each (In a Pack of 50)
MYR1.481
Omron, Energy Sensor
  • RS Stock No. 215-4116
  • Mfr. Part No. KM1-PMU2A-FLK
Each
MYR4,485.38
Legrand 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P, 400V ac
  • RS Stock No. 238-4861
  • Mfr. Part No. 0 058 24
Each
MYR115.25
Better World
Siemens Sentron 5SY4 MCB, 2P, 10A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1303
  • Mfr. Part No. 5SY4210-7
Each
MYR343.73
ABB 80A Centred Tag Fuse, NH000, 500V
  • RS Stock No. 779-9974
  • Mfr. Part No. OFAF000H80 1SCA022627R1470
Each
MYR35.27
Eaton 15A T Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 848-4188
  • Mfr. Part No. LP-CC-15
Each
MYR290.05
RS PRO 5A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 177-8088
Each (In a Pack of 50)
MYR1.963
ETI 10A DII Diazed Fuse, E27 Thread Size, gG - gL, 500V ac
  • RS Stock No. 413-658
  • Mfr. Part No. 2312404
Each (In a Pack of 5)
MYR5.536
Littelfuse 2A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 754-6269
  • Mfr. Part No. 0SPF002.H
Each
MYR62.58
Wickmann 4A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 174-0250
  • Mfr. Part No. 0313004.MXP
1 Box of 1000
MYR4,389.00
SIBA 500mA M Ceramic Cartridge Fuse, 5 x 25mm
  • RS Stock No. 267-3464
  • Mfr. Part No. 70-010-05/0.5A
Each (In a Pack of 5)
MYR34.362
RS PRO 250mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 610-9888
Each (In a Pack of 10)
MYR2.41
RS PRO Residential RCCBs, 40A, 2 Pole, 30mA, Type A, 230V
  • RS Stock No. 284-2369
Each
MYR223.94
Phoenix Contact Thermal Circuit Breaker - TCP 8A Single Pole 65 V dc, 250V ac Voltage Rating, 8A Current Rating
  • RS Stock No. 801-6911
  • Mfr. Part No. 0712291
Each
MYR82.25
Eaton 50A Ceramic Cartridge Fuse, 22 x 58mm
  • RS Stock No. 703-8469
  • Mfr. Part No. C22G50
Each (In a Pack of 10)
MYR37.284
Better World
Siemens SENTRON 5SY8 MCB, 1P, 4A Curve C, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 213-1105
  • Mfr. Part No. 5SY8104-7
Each
MYR290.13
Better World
Schneider Electric Multi 9 MCB, 1P, 10A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 219-9151
  • Mfr. Part No. M9F42110
Each
MYR413.46
Littelfuse PC Board Non Resettable Fuse, Radial 500mA, 125V ac/dc
  • RS Stock No. 738-3078
  • Mfr. Part No. 0259.500T
Each
MYR32.40
Siemens 160A Centred Tag Fuse, NH2, 690V
  • RS Stock No. 210-6890
  • Mfr. Part No. 3NA3236-6
Each (In a Pack of 3)
MYR342.357
Socomec 16A F Cartridge Fuse, 10 x 38mm
  • RS Stock No. 223-2795
  • Mfr. Part No. 60130016
Each (In a Pack of 10)
MYR6.12
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