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

2238 / 999+
Schneider Electric, ComPacT New Generation MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-7743
  • Mfr. Part No. C16B42D100
Each
MYR6,187.72
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 32A, Breaking Capacity 55 kA, DIN Rail Mount
  • RS Stock No. 271-9899
  • Mfr. Part No. 3VA1132-5GD46-0AA0
Each
MYR2,679.43
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3807
  • Mfr. Part No. 3VA2040-8JP36-0AA0
Each
MYR8,173.74
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4641
  • Mfr. Part No. 3VA2140-6KQ36-0AA0
Each
MYR10,053.93
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 16A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 271-9450
  • Mfr. Part No. 3VA1196-3GE46-0AA0
Each
MYR2,326.97
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 2.5 kA, Fixed Mount
  • RS Stock No. 270-4768
  • Mfr. Part No. 3VA2163-7MQ32-0AA0
Each
MYR8,262.67
Better World
Siemens SENTRON 5SY8 MCB, 1P, 13A Curve C, 5 kA Breaking Capacity
  • RS Stock No. 216-4062
  • Mfr. Part No. 5SY8113-7
Each
MYR256.13
Better World
ABB Emax2 Electronic Circuit Breaker 3.2kA Ekip Touch LSI, 3 channels
  • RS Stock No. 259-3266
  • Mfr. Part No. 1SDA071165R1
Each
MYR77,965.28
Schneider Electric, ComPacT MCCB 3P 50A, Fixed Mount
  • RS Stock No. 260-7462
  • Mfr. Part No. C10V3MA050
Each
MYR5,964.84
Eaton 0.75A Resettable Fuse, 6V
  • RS Stock No. 225-8231
  • Mfr. Part No. PTSLR08056V075
Each (In a Pack of 10)
MYR3.969
ABB Emax2 Electronic Circuit Breaker 250A Ekip Touch LSI, 4 channels
  • RS Stock No. 259-3392
  • Mfr. Part No. 1SDA071325R1
Each
MYR35,585.29
Better World
Siemens, SENTRON MCCB 4P 80A, Breaking Capacity 55 kA
  • RS Stock No. 209-6863
  • Mfr. Part No. 3VA1180-5EF42-0AA0
Each
MYR3,124.29
Bourns 3.3A Resettable Fuse, 16V
  • RS Stock No. 245-9161
  • Mfr. Part No. MF-LSMF330/16X-2
Each (On a Reel of 3000)
MYR2.664
ABB Emax2 Electronic Circuit Breaker 6.3kA Ekip Touch LSI, 4 / f channels
  • RS Stock No. 259-3973
  • Mfr. Part No. 1SDA072025R1
Each
MYR328,401.45
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 85 kA
  • RS Stock No. 209-7057
  • Mfr. Part No. 3VA2063-6HL42-0AA0
Each
MYR3,855.20
Better World
Schneider Electric TeSys Thermal Circuit Breaker - GV4LE 3 Pole 690V ac Voltage Rating, 2A Current Rating
  • RS Stock No. 175-1451
  • Mfr. Part No. GV4LE02N6
Each
MYR2,590.02
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4749
  • Mfr. Part No. 3VA2163-7JP36-0AA0
Each
MYR7,785.94
Eaton 350A Tag Fuse, 201.4 x 91 x 91mm, 1.5kV, 205mm
  • RS Stock No. 282-6237
  • Mfr. Part No. PV-350A-3L-15
Each
MYR2,620.87
ABB, Tmax XT MCCB 4P 6.3A, Fixed Mount
  • RS Stock No. 237-6219
  • Mfr. Part No. 1SDA067027R1 XT2N 160 TMD 6.3A FF
Each
MYR2,251.97
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 271-9323
  • Mfr. Part No. 3VA1140-4ED46-0AA0
Each
MYR2,450.18
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