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

71 / 999+
ABB System Pro M Compact S200M MCB, 3P, 10A Curve C, 440V AC, 12V DC, 10 kA Breaking Capacity
  • RS Stock No. 535-4267
  • Mfr. Part No. 2CDS273001R0104 S203M-C10
Each
MYR493.11
Eaton 25A DIN Rail Mount 6.3 x 32mm Fuse Block, 300V
  • RS Stock No. 233-0629
  • Mfr. Part No. BK-S-8301-1X-DIN
Each (In a Pack of 10)
MYR28.294
Better World
ABB System Pro M Compact S200 MCB, 4P, 20A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 746-7810
  • Mfr. Part No. 2CDS254001R0204 S204-C20
Each
MYR950.82
Eaton, xEnergy MCCB 3P 125A, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 454-8146
  • Mfr. Part No. 259086 NZMN1-A125
Each
MYR4,730.70
RS PRO 2A FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 420-167
Each (In a Pack of 10)
MYR10.689
Better World
ABB System Pro M Compact S200 MCB, 1P, 10A Curve D, 253V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 527-9469
  • Mfr. Part No. 2CDS251001R0101 S201-D10
Each
MYR110.65
Siemens, SENTRON MCCB 3P 150A, Breaking Capacity 7 kA, Fixed Mount
  • RS Stock No. 147-913
  • Mfr. Part No. 3VA5215-5EF31-2AA0
Each
MYR7,672.88
Better World
Schneider Electric 6A T Ceramic Cartridge Fuse, 8.5 x 32mm
  • RS Stock No. 211-2280
  • Mfr. Part No. DF2BA0600
Each (In a Pack of 10)
MYR41.917
Better World
Schneider Electric Acti 9 C60H-DC MCB, 1P, 6A Curve C, 250V DC
  • RS Stock No. 772-1502
  • Mfr. Part No. A9N61506
Each
MYR302.37
Schurter PC Board Non Resettable Fuse 500mA, 125V ac/dc
  • RS Stock No. 865-7806
  • Mfr. Part No. 0034.4216
Each (In a Pack of 10)
MYR8.849
Littelfuse 5A Brown Blade Car Fuse, 32V dc
  • RS Stock No. 787-4108
  • Mfr. Part No. 0287005.PXCN
Each (In a Pack of 10)
MYR1.67
RS PRO Residential RCCBs, 40A, 4 Pole, 30mA, Type A, 400V
  • RS Stock No. 284-2373
Each
MYR433.28
Eaton 6.3A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 169-9451
  • Mfr. Part No. S500-6.3-R
1 Bag of 1000
MYR1,019.20
Schneider Electric Shunt Trip Shunt trip for use with ComPact NS630b → 1600, ComPact NS1600b → 3200
  • RS Stock No. 247-1856
  • Mfr. Part No. 33662
Each
MYR1,762.75
Europa Busbar
  • RS Stock No. 849-6285
  • Mfr. Part No. ECUBB18
Each
MYR49.79
Eaton 50A Rail Mount Fuse Holder for 2 Fuse
  • RS Stock No. 221-538
  • Mfr. Part No. 402046
Each
MYR176.29
Mersen 6A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 188-7044
  • Mfr. Part No. F222208
Each (In a Pack of 10)
MYR7.425
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 16A Curve C, 100 → 130V AC, 12 → 144V DC, 10 kA Breaking Capacity
  • RS Stock No. 734-9295
  • Mfr. Part No. A9F87216
Each
MYR1,042.31
RS PRO 2A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 177-8140
Each (In a Pack of 20)
MYR3.872
Siemens SENTRON 1 Phase Busbar, 27mm Pitch
  • RS Stock No. 217-6963
  • Mfr. Part No. 5ST3733
Each
MYR164.78
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