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

2295 / 999+
Temporarily out of stock
Eaton 20A Bolted Tag Fuse, F2, 550V ac
  • RS Stock No. 181-8516
  • Mfr. Part No. ESD20
1 Box of 20
MYR607.72
Temporarily out of stock
Better World
Siemens, 3VA1 MCCB 3P 96A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 210-3329
  • Mfr. Part No. 3VA1120-5ED32-0AA0
Each
MYR1,811.69
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 1P 100A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 271-9654
  • Mfr. Part No. 3VA11104ED120AA0
Each
MYR1,094.75
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 55 kA
  • RS Stock No. 209-6763
  • Mfr. Part No. 3VA1116-5EE46-0AA0
Each
MYR5,964.16
Temporarily out of stock
Siemens, SENTRON MCCB 3P 800A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-4852
  • Mfr. Part No. 3VA2580-6JP32-0AA0
Each
MYR19,249.75
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 4 channels
  • RS Stock No. 259-3847
  • Mfr. Part No. 1SDA071859R1
Each
MYR193,751.19
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 32A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 271-9880
  • Mfr. Part No. 3VA1132-3GD42-0AA0
Each
MYR2,205.13
Temporarily out of stock
Eaton xEffect MCB, 3P, 750mA Curve C
  • RS Stock No. 230-0939
  • Mfr. Part No. 177399 FAZ6-C0,75/3
Each
MYR604.14
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-3917
  • Mfr. Part No. 3VA2110-0HL32-0AA0
Each
MYR5,614.26
Temporarily out of stock
Siemens, SENTRON MCCB 3P 800A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 272-0192
  • Mfr. Part No. 3VA1580-7EF32-0AA0
Each
MYR16,736.73
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip G Hi-Touch LSIG, 3 channels
  • RS Stock No. 259-3145
  • Mfr. Part No. 1SDA071000R1
Each
MYR55,012.49
Temporarily out of stock
Better World
Siemens SENTRON 5SY7 MCB, 2P, 13A Curve B, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 209-7540
  • Mfr. Part No. 5SY7213-6
Each
MYR409.18
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 40A, Fixed Mount
  • RS Stock No. 260-7632
  • Mfr. Part No. C11H4TM040B
Each
MYR3,998.81
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9690
  • Mfr. Part No. 3VA11106GE460AA0
Each
MYR2,607.52
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip G Touch LSIG, 4 channels
  • RS Stock No. 259-3520
  • Mfr. Part No. 1SDA071497R1
Each
MYR52,038.67
Temporarily out of stock
Better World
Schneider Electric TeSys Thermal Circuit Breaker - GV4PE 3 Pole 690V ac Voltage Rating, 12.5A Current Rating
  • RS Stock No. 175-1535
  • Mfr. Part No. GV4PE12N6
Each
MYR3,248.92
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Touch LI, 4 channels
  • RS Stock No. 259-4602
  • Mfr. Part No. 1SDA072864R1
Each
MYR42,281.53
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 32A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9904
  • Mfr. Part No. 3VA1132-6GD42-0AA0
Each
MYR2,616.25
Temporarily out of stock
Siemens SENTRON Mounting Plate for use with 3VA2 100/160/250
  • RS Stock No. 210-3526
  • Mfr. Part No. 3VA9221-0WK40
Each
MYR201.09
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 3.2kA Ekip Dip LSI, 4 channels
  • RS Stock No. 259-3788
  • Mfr. Part No. 1SDA071793R1
Each
MYR102,590.56
1
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