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

2245 / 999+
Temporarily out of stock
Mersen 32A FF Cartridge Fuse, 14 x 51mm
  • RS Stock No. 136-0625
  • Mfr. Part No. Q1017189 / FR14GR69V32T
Each
MYR105.56
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 2P, 13A Curve C, 400V AC, 72V DC
  • RS Stock No. 209-7443
  • Mfr. Part No. 5SL4213-7
Each
MYR362.01
Temporarily out of stock
Better World
Eaton 450A Tag Fuse, 201 x 74 x 74mm, 1.5kV, 170mm
  • RS Stock No. 282-6249
  • Mfr. Part No. PV-450A-3L-BU-15
Each
MYR2,696.79
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-8052
  • Mfr. Part No. C25W42D100
Each
MYR18,711.45
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 4P 25A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 178-8216
  • Mfr. Part No. LV426361
Each
MYR2,494.81
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4593
  • Mfr. Part No. 3VA2140-0HL42-0AA0
Each
MYR6,827.01
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3778
  • Mfr. Part No. 3VA2040-7JP46-0AA0
Each
MYR10,735.90
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Dip LSI, 4 channels
  • RS Stock No. 259-3527
  • Mfr. Part No. 1SDA071503R1
Each
MYR38,455.14
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 12.5A, Fixed Mount
  • RS Stock No. 260-7496
  • Mfr. Part No. C10W3MA013
Each
MYR6,788.73
Temporarily out of stock
Schurter 1.6A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 173-8054
  • Mfr. Part No. 8020.5013.G
1 Box of 1000
MYR2,732.40
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9336
  • Mfr. Part No. 3VA1140-6ED36-0AA0
Each
MYR1,520.82
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 250A, Fixed Mount
  • RS Stock No. 260-8115
  • Mfr. Part No. C40H42D250
Each
MYR26,710.31
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 270-3740
  • Mfr. Part No. 3VA2040-5KQ42-0AA0
Each
MYR8,550.74
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-3842
  • Mfr. Part No. 3VA2063-6HM46-0AA0
Each
MYR7,756.83
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-3937
  • Mfr. Part No. 3VA2110-0KQ36-0AA0
Each
MYR11,393.03
In Stock
Schurter SMD Non Resettable Fuse 2.5A, 125V ac/dc
  • RS Stock No. 173-7997
  • Mfr. Part No. 3404.0117.22
Each (On a Reel of 750)
MYR2.254
Temporarily out of stock
Siemens Alpha Flange for use with General Distributor Accessories
  • RS Stock No. 209-7094
  • Mfr. Part No. 8GK9100-0KK01
Each
MYR96.30
Temporarily out of stock
Siemens SENTRON Auxiliary Switch Kit for use with 3VA5
  • RS Stock No. 272-0229
  • Mfr. Part No. 3VA9477-0GX01
Each
MYR124.79
Temporarily out of stock
Bourns 60A Tag Fuse, 66mm, 240 V ac, 150V dc, 24.1mm
  • RS Stock No. 254-4213
  • Mfr. Part No. PF-MB1-60
Each (In a Box of 10)
MYR271.541
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-3760
  • Mfr. Part No. 3VA2040-6KQ46-0AA0
Each
MYR12,647.08
1
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