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

34 / 999+
Eaton 4A F Glass Cartridge Fuse, 6.3 x 25mm
  • RS Stock No. 851-1463
  • Mfr. Part No. AGX-4
Each
MYR11.26
Littelfuse 50A Grey, White Fuse Strips Car Fuse, 80V dc
  • RS Stock No. 226-0844
  • Mfr. Part No. 157.5701.5501
Each
MYR43.72
Legrand 4117 RCD, 63A, 3+N Pole, 30mA, Type A
  • RS Stock No. 863-7764
  • Mfr. Part No. 4 117 61
Each
MYR907.68
Eaton 80mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1739
  • Mfr. Part No. S506-80-R
Each (In a Pack of 10)
MYR4.919
Better World
Schneider Electric Multi 9 C60SP MCB, 3P, 32A Curve D, 440V AC, 15 kA Breaking Capacity
  • RS Stock No. 211-2405
  • Mfr. Part No. M9F23332
Each
MYR279.32
Schurter 2A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 789-7781
  • Mfr. Part No. 0001.2507
Each (In a Bag of 10)
MYR2.575
Mersen 1A Ceramic Cartridge Fuse, 8 x 32mm
  • RS Stock No. 304-1026
  • Mfr. Part No. C218709
Each (In a Pack of 10)
MYR17.836
Phoenix Contact 1A Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 253-7610
  • Mfr. Part No. 2939014
Each (In a Pack of 10)
MYR2.375
ABB System Pro M Compact S200 M UC MCB, 1P, 4A Curve K, 230V AC, 220V DC, 10 kA Breaking Capacity
  • RS Stock No. 204-317
  • Mfr. Part No. 2CDS271061R0337
Each
MYR787.21
Mersen 16A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 188-7274
  • Mfr. Part No. F214618
Each (In a Pack of 10)
MYR7.246
Eaton 2A gG/gL Cartridge Fuse, 10 x 38mm
  • RS Stock No. 229-177
  • Mfr. Part No. C10G2 CYLINDRICAL FUSE 10 x 38 2A GG 500V AC
1 Pack of 10
MYR47.67
Littelfuse 1A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4375
  • Mfr. Part No. 0217001.MXP
Each (In a Pack of 10)
MYR1.669
Schurter 2A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 269-3874
  • Mfr. Part No. 8020.5071
Each
MYR4.03
Schneider Electric, ComPacT MCCB 3P 400A, Fixed Mount
  • RS Stock No. 260-8087
  • Mfr. Part No. C40F3
Each
MYR9,594.72
Siemens 63A DIII Diazed Fuse, 440 V dc, 500V ac
  • RS Stock No. 232-2058
  • Mfr. Part No. 5SB4311
Each (In a Pack of 25)
MYR7.322
ABB 125A Tag Fuse, 79 x 30 x 60mm, 500V
  • RS Stock No. 250-4398
  • Mfr. Part No. 1SCA022697R3070
1 Box of 3
MYR257.24
Schurter 10A Panel Mount Fuse Holder for 5 x 20mm Fuse, 2P, 250V ac
  • RS Stock No. 173-5638
  • Mfr. Part No. 4301.1401
Each (In a Bag of 50)
MYR19.171
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 4P 400A, Fixed Mount
  • RS Stock No. 232-0099
  • Mfr. Part No. 1SDA054478R1 T5N400 FF TMA 400A
Each
MYR9,574.52
WJ Furse Copper Alloy Earth Clamp Nominal Rod dia. 9.5mm
  • RS Stock No. 153-2962
  • Mfr. Part No. 7TCA083220R0002 CR205
Each (In a Pack of 10)
MYR58.393
RS PRO Metal Lightning Earth Clamp
  • RS Stock No. 426-3126
Each (In a Pack of 10)
MYR13.062
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