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

2293 / 999+
In Stock
Schurter PC Board Non Resettable Fuse, Radial 800mA, 250V ac
  • RS Stock No. 173-9789
  • Mfr. Part No. 0034.6614
Each (In a Bag of 100)
MYR1.812
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 2.5 kA, Fixed Mount
  • RS Stock No. 270-4711
  • Mfr. Part No. 3VA2163-5MP36-0AA0
Each
MYR5,677.13
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 36 kA
  • RS Stock No. 210-1645
  • Mfr. Part No. 3VA1125-4EF42-0AA0
Each
MYR2,303.22
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3706
  • Mfr. Part No. 3VA2025-8HN42-0AA0
Each
MYR6,598.55
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 209-4991
  • Mfr. Part No. 3VA1140-6EE46-0AA0
Each
MYR2,304.84
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 209-5116
  • Mfr. Part No. 3VA2110-5HL46-0AA0
Each
MYR3,882.96
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 6.3kA Ekip G Hi-Touch LSIG, 3 channels
  • RS Stock No. 259-4450
  • Mfr. Part No. 1SDA072650R1
Each
MYR255,175.60
Temporarily out of stock
Siemens SENTRON 5SJ4 MCB, 1P, 3A Curve C
  • RS Stock No. 216-5920
  • Mfr. Part No. 5SJ4103-7HG42
Each
MYR352.96
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 16A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 271-9632
  • Mfr. Part No. 3VA10964ED420AA0
Each
MYR2,005.98
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2kA 1SDA07, 4 channels
  • RS Stock No. 259-3694
  • Mfr. Part No. 1SDA071669R1
Each
MYR72,482.55
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 3.2kA Ekip Touch LSIG, 3 channels
  • RS Stock No. 259-4357
  • Mfr. Part No. 1SDA072526R1
Each
MYR112,998.42
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A Ekip G Touch LSIG, 4 channels
  • RS Stock No. 259-3558
  • Mfr. Part No. 1SDA071537R1
Each
MYR58,543.72
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip G Hi-Touch LSIG, 4 channels
  • RS Stock No. 259-3646
  • Mfr. Part No. 1SDA071620R1
Each
MYR60,680.96
Temporarily out of stock
Siemens 24V ac Circuit Trip
  • RS Stock No. 223-7621
  • Mfr. Part No. 5TT4405-2
Each
MYR436.81
Temporarily out of stock
Better World
Kimberly Clark
  • RS Stock No. 210-3517
  • Mfr. Part No. 3VA9163-0JA12
Each
MYR188.86
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 5kA Ekip G Hi-Touch LSIG, 3 channels
  • RS Stock No. 259-4429
  • Mfr. Part No. 1SDA072620R1
Each
MYR181,113.21
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip Touch LSIG, 3 channels
  • RS Stock No. 259-4084
  • Mfr. Part No. 1SDA072176R1
Each
MYR22,671.25
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 250A Ekip Hi-Touch LSI, 4 channels
  • RS Stock No. 259-3394
  • Mfr. Part No. 1SDA071328R1
Each
MYR52,995.40
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 20A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 271-9811
  • Mfr. Part No. 3VA1120-3ED42-0AA0
Each
MYR2,205.13
Temporarily out of stock
Bourns Thermal Fuse +82°C 50 A, 28V
  • RS Stock No. 258-6411
  • Mfr. Part No. SC82AAB
Each (In a Bag of 5000)
MYR2.897
1
2293
2329
Results per page

Related links