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

46580 Products showing for Fuses & Circuit Breakers

37 of 999+
Hager RCBO, 32A Current Rating, 1P Poles, 30mA Trip Sensitivity, Type AC
  • RS Stock No. 251-2019
  • Mfr. Part No. ADC732F
Each
MYR1,254.93(exc. VAT)
RS PRO 250mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-738
Each (In a Pack of 10)
MYR2.584(exc. VAT)
Better World
Siemens, SENTRON MCCB 4P 250A, Fixed Mount
  • RS Stock No. 210-1692
  • Mfr. Part No. 3VA1225-1AA42-0AA0
Each
MYR3,252.87(exc. VAT)
Schurter 1.6A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 269-3866
  • Mfr. Part No. 8020.5013
Each
MYR4.23(exc. VAT)
RS PRO MCB, 1P, 6A Curve B, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0171
Each
MYR25.42(exc. VAT)
RS PRO 10A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-520
Each (In a Pack of 10)
MYR2.016(exc. VAT)
Eaton 440mA F Melamine Cartridge Fuse, 10 x 35mm
  • RS Stock No. 459-7918
  • Mfr. Part No. DMM-B-44-100-R
Each (In a Pack of 5)
MYR322.81(exc. VAT)
Mersen 50A Rail Mount Fuse Holder for 14 x 51mm Fuse, 3P, 690V ac
  • RS Stock No. 768-3769
  • Mfr. Part No. S331032
Each
MYR266.54(exc. VAT)
Eaton 20A Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 703-8434
  • Mfr. Part No. C14G20
Each (In a Pack of 10)
MYR5.91(exc. VAT)
RS PRO 500mA FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 721-1563
Each (In a Pack of 10)
MYR11.605(exc. VAT)
Eaton 160A Rail Mount Fuse Holder for NH00 Fuse, 3P, 690V ac
  • RS Stock No. 182-1438
  • Mfr. Part No. TD00-DI
Each
MYR186.98(exc. VAT)
RS PRO 12A M Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 182-4004
Each (In a Pack of 5)
MYR41.90(exc. VAT)
RS PRO 1.5A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 668-6032
Each (In a Pack of 10)
MYR1.89(exc. VAT)
Better World
ABB System Pro M Compact S200 MCB, 2P, 10A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 746-7719
  • Mfr. Part No. 2CDS252001R0104 S202-C10
Each
MYR248.35(exc. VAT)
WJ Furse Copper Earth Bar L. 125mm x W. 90mm x H. 90mm 2 Ways
  • RS Stock No. 124-2495
  • Mfr. Part No. 7TCA083670R0600 LK205
Each
MYR413.04(exc. VAT)
Better World
Schneider Electric Multi 9 C60BP MCB, 2P, 4A Curve D, 440V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 211-2445
  • Mfr. Part No. M9F43204
Each
MYR1,051.95(exc. VAT)
Schneider Electric Resi9 Two Phase Distribution Board, 90 A
  • RS Stock No. 276-8952
  • Mfr. Part No. R9H13403
Each
MYR450.97(exc. VAT)
Phoenix Contact Three Phase Surge Arrester, 30kA, = 2.5kV, DIN Rail Mount
  • RS Stock No. 249-9522
  • Mfr. Part No. 2882776
Each
MYR2,573.03(exc. VAT)
Littelfuse PC Board Non Resettable Fuse, Radial 2A, 125V ac/dc
  • RS Stock No. 878-3264
  • Mfr. Part No. 0273002.H
Each
MYR32.37(exc. VAT)
Siemens 6A DII Diazed Fuse, E27 Thread Size, gG, 500V ac
  • RS Stock No. 396-174
  • Mfr. Part No. 5SB231
Each (In a Pack of 5)
MYR8.724(exc. VAT)
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