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

46580 Products showing for Fuses & Circuit Breakers

50 / 999+
RS PRO Single Phase Industrial Surge Protector, 40kA, 1.25kV, DIN Rail Mount
  • RS Stock No. 101-797
Each
MYR308.28
Better World
Schneider Electric Multi 9 MCB Mini Circuit Breaker, 1P, 8A Curve C, 277V AC
  • RS Stock No. 256-6779
  • Mfr. Part No. M9F42108
Each
MYR494.41
Littelfuse 15A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 738-2829
  • Mfr. Part No. 0326015.MXP
Each (In a Pack of 10)
MYR7.945
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 6A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3332
  • Mfr. Part No. A9F54206
Each
MYR489.79
nVent SCHROFF Earthing Kit
  • RS Stock No. 454-9795
  • Mfr. Part No. 21100490
Each
MYR39.87
MEAN WELL Surge Protector, 20kA, 1500V (Volts)
  • RS Stock No. 424-954
  • Mfr. Part No. SPD-20-240P
Each
MYR82.96
RS PRO Residential RCCBs, 25A, 2 Pole, 30mA, Type A, 230V
  • RS Stock No. 284-2367
Each
MYR179.15
RS PRO 500mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-463
Each (In a Pack of 10)
MYR1.676
Better World
ABB System Pro M Compact S200 MCB, 3P, 63A Curve D, 440V AC, 12V DC, 6 kA Breaking Capacity
  • RS Stock No. 527-9677
  • Mfr. Part No. 2CDS253001R0631 S203-D63
Each
MYR486.13
MK Electric Earthing Lead Adapter Brass
  • RS Stock No. 491-822
  • Mfr. Part No. 9933
Each
MYR83.16
Mersen 6.3A Time Lag Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 630-849
  • Mfr. Part No. A090551Q
1 Box of 10
MYR34.15
Better World
Schneider Electric - Easy Series, EasyPact CVS Circuit breaker 3P 50A, Breaking Capacity 50kA, Fixed Mount
  • RS Stock No. 260-9751
  • Mfr. Part No. LV510474
Each
MYR2,675.24
Wickmann 500mA F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 174-0740
  • Mfr. Part No. 0508.500MXP
Each (In a Pack of 10)
MYR32.997
Siemens ALPHA Busbar
  • RS Stock No. 226-0831
  • Mfr. Part No. 8GK9733-0KK10
Each
MYR152.31
SIBA 2A F Ceramic Cartridge Fuse, 5 x 25mm
  • RS Stock No. 267-3391
  • Mfr. Part No. 70-010-04/2A
Each (In a Pack of 5)
MYR25.232
Phoenix Contact Surge Protector, 0.5kA, DIN Rail Mount
  • RS Stock No. 890-3812
  • Mfr. Part No. 2905241
Each
MYR3,674.41
Siemens ALPHA Busbar
  • RS Stock No. 236-8449
  • Mfr. Part No. 8GK9731-0KK50
Each
MYR171.42
Schneider Electric, PowerPact Circuit breaker 3P 60A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 357-992
  • Mfr. Part No. NHDL36060U31X
Each
MYR11,116.18
RS PRO F, T Fuse Kit
  • RS Stock No. 893-8530
Each
MYR348.88
RS PRO F, T Fuse Kit
  • RS Stock No. 893-8537
Each
MYR491.84
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