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

2263 / 999+
Schurter TA36 Rocker Circuit Breaker - TA36 2 Pole 60 V dc, 277 V ac Voltage Rating, 16A Current Rating
  • RS Stock No. 221-5617
  • Mfr. Part No. 3-128-230
1 Box of 10
MYR839.88
ABB MCCB Molded Case Circuit Breaker 4P 630A, Fixed Mount
  • RS Stock No. 250-4146
  • Mfr. Part No. 1SDA054417R1
Each
MYR21,105.38
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 25A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 271-9857
  • Mfr. Part No. 3VA1125-4GD46-0AA0
Each
MYR2,450.18
Better World
ABB, Tmax XT MCCB 3P 100A, Fixed Mount
  • RS Stock No. 236-6532
  • Mfr. Part No. 1SDA068003R1 XT2V 160 Ekip M 100A FF
Each
MYR8,822.94
Siemens, SENTRON MCCB 4P 630A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-4817
  • Mfr. Part No. 3VA2563-6JP42-0AA0
Each
MYR25,687.53
Better World
Siemens, SENTRON MCCB 4P 20A, Breaking Capacity 55 kA
  • RS Stock No. 209-6776
  • Mfr. Part No. 3VA1120-5EF42-0AA0
Each
MYR2,970.06
Better World
Siemens SENTRON 3VA1 MCB, 2P, 63A
  • RS Stock No. 224-7877
  • Mfr. Part No. 3VA1163-5ED26-0AA0
Each
MYR1,908.12
Bourns 1.35A Resettable Fuse, 72V
  • RS Stock No. 647-8695P
  • Mfr. Part No. MF-RX135/72-0
Each (Supplied in a Bag)
MYR2.387
ABB Emax2 Electronic Circuit Breaker 5kA 1SDA07, 4 channels
  • RS Stock No. 259-3880
  • Mfr. Part No. 1SDA071901R1
Each
MYR221,164.57
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3793
  • Mfr. Part No. 3VA2040-8HL36-0AA0
Each
MYR4,969.65
Better World
Siemens, SENTRON MCCB 4P 125A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 271-9700
  • Mfr. Part No. 3VA11123FE460AA0
Each
MYR4,309.25
Better World
Siemens, SENTRON MCCB 1P 125A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 271-9725
  • Mfr. Part No. 3VA1112-5ED16-0AA0
Each
MYR1,997.44
Schneider Electric, ComPacT MCCB 3P 25A, Fixed Mount
  • RS Stock No. 260-7554
  • Mfr. Part No. C11E3TM025L
Each
MYR2,006.94
Better World
Siemens, 0AA0 MCCB 3P 20A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 211-5966
  • Mfr. Part No. 3VA1020-3ED32-0AA0
Each
MYR1,710.36
Better World
Siemens SENTRON 5SY8 MCB, 1P, 1A Curve C
  • RS Stock No. 216-5947
  • Mfr. Part No. 5SY8101-7
Each
MYR309.32
Better World
Siemens, SENTRON MCCB 4P 1kA, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 209-5253
  • Mfr. Part No. 3VA2510-6HL42-0AA0
Each
MYR30,775.16
Siemens Sentron Series Connector for use with Busbar
  • RS Stock No. 228-8208
  • Mfr. Part No. 5ST3791-0
Each (In a Pack of 10)
MYR21.485
ABB Emax2 Electronic Circuit Breaker 4kA Ekip G Hi-Touch LSIG, 3 channels
  • RS Stock No. 259-3312
  • Mfr. Part No. 1SDA071220R1
Each
MYR135,486.54
ABB Emax2 Electronic Circuit Breaker 2.5kA Ekip G Hi-Touch LSIG, 3 channels
  • RS Stock No. 259-4296
  • Mfr. Part No. 1SDA072430R1
Each
MYR86,607.29
Better World
Siemens RCBO, 100A Current Rating, 4P Poles, 300mA Trip Sensitivity, Type D, Sentron Range
  • RS Stock No. 243-6260
  • Mfr. Part No. 5SU1674-8DK81
Each
MYR20,218.75
1
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