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

46578 Products showing for Fuses & Circuit Breakers

208 / 999+
In Stock
Better World
ABB System Pro M Compact S200 MCB, 2P, 2A Curve K, 400V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 746-7970
  • Mfr. Part No. 2CDS252001R0277 S202-K2
Each
MYR449.77
In Stock
Phoenix Contact CAPAROC Electronic Circuit Breaker 10A, 1 channels
  • RS Stock No. 265-8986
  • Mfr. Part No. 1157284
Each
MYR280.42
Temporarily out of stock
Eaton 4A Tag Fuse, 550V ac
  • RS Stock No. 228-907
  • Mfr. Part No. NSD4
1 Pack of 20
MYR875.86
Temporarily out of stock
Hager Thermal Circuit Breaker - HAD 4P Pole Fixed, 30A Current Rating
  • RS Stock No. 602-099
  • Mfr. Part No. HDA430
Each
MYR1,279.37
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 500A 3VA, 3 channels
  • RS Stock No. 156-757
  • Mfr. Part No. 3VA2450-7MQ32-0AA0
Each
MYR23,475.18
In Stock
Mersen 10A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 270-3097
  • Mfr. Part No. Q206071
Each (In a Box of 10)
MYR3.905
Temporarily out of stock
Lovato RCBO, 10A Current Rating, 1P + N Poles, 300mA Trip Sensitivity, Type A, P1RE1NC Range
  • RS Stock No. 276-5677
  • Mfr. Part No. P1RE1NC10A300
Each
MYR746.81
In Stock
Littelfuse 500mA F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4460
  • Mfr. Part No. 0216.500MXP
Each (In a Pack of 10)
MYR13.161
In Stock
Eaton 5A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7089
  • Mfr. Part No. MDA-5-R
Each
MYR33.58
Temporarily out of stock
ABB System Pro M Compact S200M MCB, 3+N, 6A, Type Z, 400V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 201-068
  • Mfr. Part No. 2CDS273103R0378
Each
MYR2,841.19
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 25A 3VA2, 4 channels
  • RS Stock No. 157-394
  • Mfr. Part No. 3VA2125-8HL46-0AA0
Each
MYR7,335.99
In Stock
Schneider Electric ComPacT NSX Padlock for use with ComPacT NSX100, NSX160, NSX250
  • RS Stock No. 205-317
  • Mfr. Part No. LV429370T
Each
MYR296.10
In Stock
RS PRO 3.15A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-441
Each (In a Pack of 10)
MYR1.45
Temporarily out of stock
ABB Tmax XT Trip Unit for use with Tmax XT
  • RS Stock No. 236-7217
  • Mfr. Part No. 1SDA067250R1 TMD 32-320 XT2 4p
Each
MYR1,460.00
Temporarily out of stock
ABB S401M MCB, 1P, 40A Curve K, 254V AC, 12V DC, 15 kA Breaking Capacity
  • RS Stock No. 140-316
  • Mfr. Part No. 2CCS571001R0557
Each
MYR356.74
In Stock
Schurter Surface Mount Fuse 1A, 125V ac
  • RS Stock No. 270-7945
  • Mfr. Part No. 3404.0009.22
Each
MYR3.55
Temporarily out of stock
Better World
Schneider Electric Multi 9 C60BP MCB, 2P, 30A Curve C, 440V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 211-2421
  • Mfr. Part No. M9F42230
Each
MYR1,086.47
Temporarily out of stock
ABB Tmax XT Trip Unit for use with Tmax XT
  • RS Stock No. 236-7244
  • Mfr. Part No. 1SDA067308R1 Ekip LSI In=100A XT2 3p
Each
MYR5,230.80
In Stock
Schneider Electric, Wiser, 16A, POWERTAG, Wireless
  • RS Stock No. 341-239
  • Mfr. Part No. CCTFR6730
Each
MYR347.58
In Stock
Schneider Electric Acti9 SE10 MCB Mini Circuit Breaker, 3P, 63A Curve C, 415V AC, 10000 A Breaking Capacity
  • RS Stock No. 339-312
  • Mfr. Part No. SE10C363
Each
MYR735.89
1
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