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

46579 Products showing for Fuses & Circuit Breakers

84 / 999+
In Stock
Better World
Schneider Electric Compact Ins, Compact Inv, Compact Nsx, Easypact Cvs, Powerpact Multistandard Phase Barrier for use
  • RS Stock No. 221-1194
  • Mfr. Part No. LV429329
Each
MYR160.11
In Stock
Better World
Schneider Electric Acti 9 iC60L MCB, 2P, 40A Curve C, 15 kA Breaking Capacity
  • RS Stock No. 219-9280
  • Mfr. Part No. A9F94240
Each
MYR866.74
Temporarily out of stock
Rockwell Automation FB50 Busbar, 1000V
  • RS Stock No. 281-6010
  • Mfr. Part No. FB501120Q1
Each
MYR273.62
In Stock
RS PRO 1A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 668-6067
Each (In a Pack of 10)
MYR1.689
In Stock
Better World
ABB System Pro M Compact S200 MCB, 1P, 3A Curve C, 230V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 746-7643
  • Mfr. Part No. 2CDS251001R0034 S201-C3
Each
MYR140.20
Temporarily out of stock
ABB Tmax XT Trip Unit for use with Tmax XT
  • RS Stock No. 237-6290
  • Mfr. Part No. 1SDA067234R1
Each
MYR1,191.85
In Stock
RS PRO 250mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 610-9608
Each (In a Pack of 10)
MYR2.014
Temporarily out of stock
Better World
Schneider Electric Surge Protector, 10kA, DIN Rail Mount
  • RS Stock No. 776-3830
  • Mfr. Part No. A9L16617
Each
MYR1,144.77
Temporarily out of stock
Eaton xEffect - FRCmM RCCB, 63A, 4 Pole, 30mA, Type A, 240/415V ac
  • RS Stock No. 123-236
  • Mfr. Part No. 170334 FRCMM-63/4/003-A
Each
MYR1,599.01
In Stock
Littelfuse 8A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4735
  • Mfr. Part No. 0215008.MXP
Each (In a Pack of 10)
MYR6.767
Temporarily out of stock
Eaton 315A British Standard Fuse, B3, 415V ac, 110mm
  • RS Stock No. 139-990
  • Mfr. Part No. ED315
Each
MYR173.04
Temporarily out of stock
Better World
Schneider Electric Plug In Kit for use with Compact Nsx 400/630
  • RS Stock No. 221-1253
  • Mfr. Part No. LV432541
Each
MYR6,822.89
In Stock
Littelfuse SMD Non Resettable Fuse 1A, 250V
  • RS Stock No. 787-4322
  • Mfr. Part No. 0464001.DR
Each (In a Pack of 5)
MYR6.28
In Stock
Legrand 4115 RCD, 80A, 1+N Pole, 30mA, Type AC
  • RS Stock No. 863-7776
  • Mfr. Part No. 4 115 07
Each
MYR451.21
In Stock
Littelfuse PC Board Non Resettable Fuse, Radial 500mA, 250V ac
  • RS Stock No. 895-1669
  • Mfr. Part No. 37205000431
Each (In a Pack of 10)
MYR4.956
In Stock
Eaton 30A Cartridge Fuse, 12.7 x 29mm
  • RS Stock No. 417-357
  • Mfr. Part No. C3030
Each (In a Pack of 5)
MYR13.032
In Stock
Better World
ABB System Pro M Compact S200 MCB, 3P, 16A Curve B, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 746-7598
  • Mfr. Part No. 2CDS253001R0165 S203-B16
Each
MYR402.28
In Stock
Better World
ABB System Pro M Compact S200 MCB, 2P, 4A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 746-7703
  • Mfr. Part No. 2CDS252001R0044 S202-C4
Each
MYR303.46
In Stock
Mersen 32A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 247-2971
  • Mfr. Part No. Z213600
1 Box of 10
MYR208.32
In Stock
RS PRO 15A Blue Blade Car Fuse, 32V dc
  • RS Stock No. 563-750
Each (In a Pack of 10)
MYR2.228
1
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