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

66 / 999+
In Stock
Eaton 2.5A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 850-7215
  • Mfr. Part No. KLM-2-1/2
Each (In a Pack of 10)
MYR69.82
Temporarily out of stock
Phoenix Contact Thermal Magnetic Circuit Breaker - TMC Single Pole 250V ac Voltage Rating DIN Rail, 5A Current Rating
  • RS Stock No. 135-899
  • Mfr. Part No. 0914497
1 Pack of 6
MYR2,201.42
In Stock
Schneider Electric Multifix Cover for use with Circuit Breaker
  • RS Stock No. 275-8759
  • Mfr. Part No. ENN12811
Each
MYR48.30
In Stock
Better World
Schneider Electric Acti 9 3 Phase Busbar, 415V ac, 18mm Pitch
  • RS Stock No. 776-2730
  • Mfr. Part No. A9XPH324
Each
MYR504.56
In Stock
Schurter 4A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 830-4271P
  • Mfr. Part No. 8020.5074.G
Each (Supplied in a Bag)
MYR3.772
In Stock
Legrand 2A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 180-6114
  • Mfr. Part No. 0 133 02
Each (In a Box of 10)
MYR13.271
In Stock
Schneider Electric Acti9 A9F0 MCB, 3P, 13A Curve C, 440V AC, 180V DC, 10 kA Breaking Capacity
  • RS Stock No. 212-170
  • Mfr. Part No. A9F07313
Each
MYR959.84
In Stock
Schurter 4A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 830-4271
  • Mfr. Part No. 8020.5074.G
Each (In a Pack of 10)
MYR3.772
In Stock
Littelfuse Inline Fuse Holder for ATO Fuse, 80V dc
  • RS Stock No. 787-4340
  • Mfr. Part No. 178.6152.0001
Each
MYR17.66
In Stock
Phoenix Contact Surge Protector, ≤1.5kV, DIN Rail Mount
  • RS Stock No. 890-3746
  • Mfr. Part No. 2906101
Each
MYR271.92
In Stock
Wickmann 10A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 174-0736
  • Mfr. Part No. 0312010.MXP
Each (In a Pack of 20)
MYR2.488
In Stock
Eaton 315mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-8639
  • Mfr. Part No. S500-315-R
Each (In a Pack of 10)
MYR2.237
In Stock
RS PRO MCB, 1P, 1A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0194
Each
MYR48.36
In Stock
Eaton NH Fuse Puller, Sizes 00 → 3
  • RS Stock No. 182-1518
  • Mfr. Part No. FEH
Each
MYR295.42
In Stock
Better World
Siemens Sentron 5SY7 MCB, 3P, 25A Curve C, 400V AC, 15 kA Breaking Capacity
  • RS Stock No. 622-0430
  • Mfr. Part No. 5SY7325-7
Each
MYR660.06
Temporarily out of stock
Better World
ABB System Pro M Compact S200 MCB, 3+N, 20A Curve K
  • RS Stock No. 237-3294
  • Mfr. Part No. 2CDS253103R0487
Each
MYR1,003.76
Temporarily out of stock
32A Cartridge Fuse, 27 x 112mm
  • RS Stock No. 262-579
  • Mfr. Part No. TB32
1 Pack of 20
MYR2,779.33
In Stock
Better World
Schneider Electric TeSys Thermal Circuit Breaker - GV3P 3 Pole 690V ac Voltage Rating DIN Rail Mount, 80A Current Rating
  • RS Stock No. 188-4740
  • Mfr. Part No. GV3P80
Each
MYR1,308.54
In Stock
Littelfuse 10A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 769-0017
  • Mfr. Part No. 0312010.HXP
Each (In a Pack of 10)
MYR1.851
In Stock
ABB 63A Centred Tag Fuse, NH000, 500V
  • RS Stock No. 779-9971
  • Mfr. Part No. OFAF000H63 1SCA022627R1390
Each
MYR33.05
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