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

28 / 999+
Littelfuse 20A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 1P, 250V ac
  • RS Stock No. 878-1536
  • Mfr. Part No. 342838
Each (In a Pack of 10)
MYR17.333
Eaton 100A Tag Fuse, NH000, 500V ac
  • RS Stock No. 703-8651
  • Mfr. Part No. 100NHG000B
Each
MYR31.95
RS PRO 4A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 668-6085
Each (In a Pack of 10)
MYR2.992
RS PRO 5A FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 209-9383
Each (In a Pack of 10)
MYR9.686
Better World
Schneider Electric Multi 9 C60BP MCB, 2P, 30A Curve D, 440V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 211-2448
  • Mfr. Part No. M9F43230
Each
MYR707.34
RS PRO 1.25A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 769-6330
Each (In a Pack of 10)
MYR5.034
Schurter 8A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 789-7804
  • Mfr. Part No. 0001.2513
Each (In a Bag of 10)
MYR2.66
Mersen Surge Protector
  • RS Stock No. 179-3063
  • Mfr. Part No. 83020152 / STPT2-40K275V-4P
Each
MYR938.40
Contactum MCB, 1P, 16A Curve B, 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 184-9030
  • Mfr. Part No. CPB1016B
Each
MYR32.20
Better World
Schneider Electric Multi 9 MCB, 1P, 2A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 219-9147
  • Mfr. Part No. M9F42102
Each
MYR579.31
Better World
Schneider Electric, Compact MCCB 3P 32A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 178-8207
  • Mfr. Part No. LV426352
Each
MYR1,491.86
Littelfuse 4A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 725-8067
  • Mfr. Part No. 0219004.MXABP
Each (In a Bag of 10)
MYR3.477
Better World
Schneider Electric RCBO, 16A Current Rating, 1P+N Poles, Type AB, Easy9 Range
  • RS Stock No. 850-8653
  • Mfr. Part No. EZ9D16816
Each
MYR163.60
Mersen 35A DIII Diazed Fuse, E33 Thread Size, gG, 500V
  • RS Stock No. 377-0500
  • Mfr. Part No. C214063
Each (In a Pack of 5)
MYR22.082
Better World
ABB System Pro M Compact S200 MCB, 1P, 25A Curve C, 230V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 746-7677
  • Mfr. Part No. 2CDS251001R0254 S201-C25
Each
MYR106.86
Better World
Schneider Electric Multi 9 C60N MCB, 3P, 10A Curve D, 10 kA Breaking Capacity
  • RS Stock No. 214-2078
  • Mfr. Part No. M9F12310
Each
MYR1,112.15
Better World
Schneider Electric Multi 9 MCB Mini Circuit Breaker, 2P, 25A Curve D, 277V AC
  • RS Stock No. 256-6819
  • Mfr. Part No. M9F53225
Each
MYR1,103.38
Eaton, xEnergy MCCB 3P 80A, Breaking Capacity 25 kA
  • RS Stock No. 454-8067
  • Mfr. Part No. 259078 NZMB1-A80
Each
MYR1,984.20
Schneider Electric Acti9 A9F0 MCB, 1P, 6A Curve C, 230V AC, 72V DC, 15 kA Breaking Capacity
  • RS Stock No. 212-248
  • Mfr. Part No. A9F07106
Each
MYR290.10
Siemens 560A NH Fuse, NH2, 1kV ac
  • RS Stock No. 269-8366
  • Mfr. Part No. 3NE3335
Each (In a Pack of 3)
MYR1,181.167
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