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

2249 / 999+
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2kA Ekip Dip LI, 4 channels
  • RS Stock No. 259-4751
  • Mfr. Part No. 1SDA073031R1
Each
MYR62,725.28
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 5kA 1SDA07, 4 channels
  • RS Stock No. 259-3872
  • Mfr. Part No. 1SDA071892R1
Each
MYR186,038.34
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1.25kA 1SDA07, 3 channels
  • RS Stock No. 259-3101
  • Mfr. Part No. 1SDA070953R1
Each
MYR33,081.86
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 50A, Breaking Capacity 55 kA
  • RS Stock No. 209-7000
  • Mfr. Part No. 3VA1150-5ED32-0AA0
Each
MYR1,811.69
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 2.5 kA, Fixed Mount
  • RS Stock No. 270-4676
  • Mfr. Part No. 3VA2140-7MN32-0AA0
Each
MYR5,049.67
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2.5kA 1SDA07, 4 channels
  • RS Stock No. 259-3726
  • Mfr. Part No. 1SDA071702R1
Each
MYR73,504.80
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 3P 50A, Breaking Capacity 70 kA, Clip-On
  • RS Stock No. 178-7802
  • Mfr. Part No. LV426554
Each
MYR2,557.11
Temporarily out of stock
Better World
Siemens RCBO, 25A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type C, Sentron Range
  • RS Stock No. 243-6183
  • Mfr. Part No. 5SU1324-7KX25
Each
MYR1,001.14
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4496
  • Mfr. Part No. 3VA2125-0HL36-0AA0
Each
MYR5,388.97
In Stock
Eaton xPole MCB, 1P, 50A Curve C, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 864-4336
  • Mfr. Part No. 242211 PLSM-C50-MW
Each
MYR143.70
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2kA Ekip Dip LI, 3 channels
  • RS Stock No. 259-4306
  • Mfr. Part No. 1SDA072451R1
Each
MYR58,636.59
Temporarily out of stock
Bourns 200A Tag Fuse, 66mm, 800V ac/dc, 24.1mm
  • RS Stock No. 254-4150
  • Mfr. Part No. PF-FB2-300
Each (In a Box of 10)
MYR714.803
Temporarily out of stock
Siemens Alpha Assembly Kit for use with Unequipped Distribution Boards
  • RS Stock No. 212-9057
  • Mfr. Part No. 8GK4351-1KK22
Each
MYR625.39
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 6.3kA Ekip Hi-Touch LSI, 4 channels
  • RS Stock No. 259-3900
  • Mfr. Part No. 1SDA071929R1
Each
MYR275,526.26
Temporarily out of stock
Wickmann 0.3A Resettable Fuse, 60V dc
  • RS Stock No. 174-0463
  • Mfr. Part No. RF0323-000
1 Reel of 20000
MYR39,429.95
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 125A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 271-9723
  • Mfr. Part No. 3VA1112-4GE46-0AA0
Each
MYR5,430.74
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4011
  • Mfr. Part No. 3VA2110-7MQ36-0AA0
Each
MYR9,688.03
In Stock
Eaton 3.5A Resettable Fuse, 6V
  • RS Stock No. 225-8293
  • Mfr. Part No. PTSLR18126V350
1 Reel of 2000
MYR6,553.80
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 5kA 1SDA07, 3 channels
  • RS Stock No. 259-3350
  • Mfr. Part No. 1SDA071266R1
Each
MYR171,820.54
Limited stock
1-pole circuit breaker, 8A
  • RS Stock No. 577-476
  • Mfr. Part No. 1658-G21-02-P10-8A
Each
MYR24.07
1
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