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

46578 Products showing for Fuses & Circuit Breakers

319 / 999+
Temporarily out of stock
Schneider Electric Compact Long Rear Connection for use with NS630b
  • RS Stock No. 341-038
  • Mfr. Part No. 33617
Each
MYR3,123.29
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 2A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3372
  • Mfr. Part No. A9F54302
Each
MYR1,084.41
Temporarily out of stock
Schneider Electric Adapter for use with ComPact NS1600b To 3200 Circuit Breaker, ComPact NS1600b To 3200 Switch
  • RS Stock No. 247-1876
  • Mfr. Part No. 33976
Each
MYR3,701.67
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 32A, Fixed Mount
  • RS Stock No. 260-9464
  • Mfr. Part No. C10H3TM032
Each
MYR3,591.27
Temporarily out of stock
Siemens, SENTRON MCCB 3P 1kA, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-4784
  • Mfr. Part No. 3VA2510-6JP32-0AA0
Each
MYR34,680.94
In Stock
Legrand 4A Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 266-3131
  • Mfr. Part No. 0 143 04
1 Box of 10
MYR207.92
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 2P 20A, Breaking Capacity 25 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-291
  • Mfr. Part No. 3VA5120-4ED21-0AA0
Each
MYR1,780.75
In Stock
Better World
Schneider Electric RCBO, 20A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 238-3282
  • Mfr. Part No. A9DK1620
Each
MYR1,005.64
New product - Preorder today
Schneider Electric Acti9 A9K MCB, 1P, 32A Curve B, 440V AC, 6000 A Breaking Capacity
  • RS Stock No. 140-007
  • Mfr. Part No. A9K01132
Each
MYR21.54
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 400A 3VA, 3 channels
  • RS Stock No. 156-711
  • Mfr. Part No. 3VA2340-6HM32-0AA0
Each
MYR13,965.56
Temporarily out of stock
ABB MCCB Molded Case Circuit Breaker 3P 630A, Fixed Mount
  • RS Stock No. 250-4143
  • Mfr. Part No. 1SDA054415R1
Each
MYR20,801.46
Temporarily out of stock
ABB System Pro M Compact SU200 MR Circuit Breaker, 1P, 13A Curve K, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 200-142
  • Mfr. Part No. 2CDS271347R0447
Each
MYR758.33
In Stock
ETA Thermal Circuit Breaker - EM12-T 24V Voltage Rating DIN Rail Mount, 40A Current Rating
  • RS Stock No. 175-0362
  • Mfr. Part No. EM12-T01-001-DC24V-40A
Each
MYR150.36
Temporarily out of stock
Siemens, SENTRON MCCB 4P 150A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-445
  • Mfr. Part No. 3VA5215-6EF41-0AA0
Each
MYR10,413.20
Temporarily out of stock
ABB SMISSLINE TP MCB, 1P, 8A Curve C, 220V AC
  • RS Stock No. 246-2507
  • Mfr. Part No. 2CCS571001R1084
Each
MYR405.78
In Stock
Better World
ABB System Pro M Compact S200 MCB, 4P, 10A, Type Z
  • RS Stock No. 237-3325
  • Mfr. Part No. 2CDS254001R0428 S204 Z 10A - 10 KA
Each
MYR1,102.20
Last RS stock
Bourns SMD Non Resettable Fuse 500mA, 50V dc
  • RS Stock No. 692-4965
  • Mfr. Part No. SF-0603F050-2
Each (In a Pack of 10)
MYR3.089
Currently unavailable
RS PRO HBC, LBC Fuse Kit
  • RS Stock No. 420-274
1 Kit
MYR874.17
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 25A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3394
  • Mfr. Part No. A9F54325
Each
MYR869.22
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 400A 3VA, 4 channels
  • RS Stock No. 156-687
  • Mfr. Part No. 3VA2340-7HN42-0AA0
Each
MYR19,508.31
1
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