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

112 / 999+
Littelfuse 500mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4347
  • Mfr. Part No. 0217.500MXP
Each (In a Pack of 10)
MYR1.406
Schneider Electric Resi9 R9PF MCB, 1P, 16A, 230V AC, 3000 A Breaking Capacity
  • RS Stock No. 276-8970
  • Mfr. Part No. R9PFD616
Each
MYR191.90
SIBA 160A NH Fuse, NH00, 500V ac
  • RS Stock No. 421-744
  • Mfr. Part No. 20-001-13/160E1
Each (In a Pack of 3)
MYR54.407
Eaton 2A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 703-8210P
  • Mfr. Part No. PV-2A10F
Each (Supplied in a Box)
MYR59.09
ABB RCBO, 16A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type A, System Pro M Compact Range
  • RS Stock No. 201-6953
  • Mfr. Part No. 2CSR255180R1164 DS201 C16 A30
Each
MYR1,034.45
RS PRO Auxiliary Release Circuit Trip for use with MS32 & MSB32 Motor Protection Circuit Breakers
  • RS Stock No. 121-6864
Each
MYR50.12
Siemens 25A NH Fuse, NH000, 500V ac
  • RS Stock No. 397-379
  • Mfr. Part No. 3NA3810
Each (In a Pack of 3)
MYR57.42
Better World
ABB System Pro M Compact S200 MCB, 2P, 10A Curve K, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 746-7999
  • Mfr. Part No. 2CDS252001R0427 S202-K10
Each
MYR388.61
Eaton 1A T Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 854-8878
  • Mfr. Part No. FNQ-R-1
Each
MYR220.02
Better World
Schneider Electric Multi 9 MCB Mini Circuit Breaker, 2P, 40A Curve D, 240V AC
  • RS Stock No. 256-6788
  • Mfr. Part No. M9F43240
Each
MYR1,090.77
Siemens 32A Fuse Holder for 10 x 38mm Fuse, 1P, 690V ac
  • RS Stock No. 269-8374
  • Mfr. Part No. 3NW7014
Each
MYR67.75
Littelfuse 200A Panel Mount Automotive Fuse Block
  • RS Stock No. 878-3245
  • Mfr. Part No. 0498900.TXN
Each
MYR63.74
Eaton xEffect MCB, 2P, 20A Curve D, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3548
  • Mfr. Part No. 102191 FAZ-D20/2-NA
Each
MYR768.34
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 6A Curve C, 100 → 133V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3290
  • Mfr. Part No. A9F54106
Each
MYR212.39
Schurter 16A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 269-3880
  • Mfr. Part No. 8020.5080
Each
MYR4.09
Better World
Schneider Electric 6A T Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 211-2283
  • Mfr. Part No. DF2CA06
Each (In a Pack of 10)
MYR41.258
Eaton xEffect MCB, 2P, 4A Curve C, 240 → 415V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 847-3361
  • Mfr. Part No. 278752 FAZ-C4/2
Each
MYR604.01
Lovato P1RD MCCB, 63A, 4 Pole, 30mA, Type A, 230 or 400V ac
  • RS Stock No. 276-5672
  • Mfr. Part No. P1RD4P63A030
Each
MYR2,420.73
Siemens 100A Centred Tag Fuse, NH000, 500V ac
  • RS Stock No. 203-2011
  • Mfr. Part No. 3NA7830
Each (In a Pack of 3)
MYR39.28
Littelfuse 630mA F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4476
  • Mfr. Part No. 0216.630MXP
Each (In a Pack of 10)
MYR5.008
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