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

263 / 999+
In Stock
Better World
Siemens Sentron 5SY4 MCB, 4P, 6A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 124-3192
  • Mfr. Part No. 5SY4406-8
Each
MYR975.69
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 250A 3VA2, 4 channels
  • RS Stock No. 157-315
  • Mfr. Part No. 3VA2225-0HN42-0AA0
Each
MYR17,715.07
Temporarily out of stock
Siemens 160A NH Fuse, NH1, 690 / 400V ac/dc
  • RS Stock No. 269-8349
  • Mfr. Part No. 3ND2136
Each (In a Pack of 3)
MYR152.94
In Stock
Mersen 10A DI Diazed Fuse, E16 Thread Size, gG, 500V
  • RS Stock No. 377-0386
  • Mfr. Part No. B214062
Each (In a Pack of 5)
MYR22.838
In Stock
Littelfuse PC Board Non Resettable Fuse, Radial 1A, 250V ac
  • RS Stock No. 895-1672
  • Mfr. Part No. 38211000410
Each (In a Pack of 10)
MYR4.475
Temporarily out of stock
Siemens SENTRON Door Sealing Frame
  • RS Stock No. 277-0796
  • Mfr. Part No. 3WA9111-0AP01
Each
MYR1,175.31
In Stock
Better World
ABB, XT4S MCCB 3P 225A, Fixed Mount
  • RS Stock No. 236-6682
  • Mfr. Part No. 1SDA068311R1 XT4S 250 TMA 225A FF
Each
MYR4,850.75
In Stock
Better World
Schneider Electric Multi 9 MCB Mini Circuit Breaker, 2P, 25A Curve C, 240V AC
  • RS Stock No. 256-6759
  • Mfr. Part No. M9F22225
Each
MYR628.64
Temporarily out of stock
ABB SU200 M MCB, 2P, 32A Curve C, 440V AC, 96V DC, 15 kA Breaking Capacity
  • RS Stock No. 201-038
  • Mfr. Part No. 2CDS272337R0324
Each
MYR1,431.41
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 250A 3VA, 4 channels
  • RS Stock No. 156-856
  • Mfr. Part No. 3VA2325-7HM42-0AA0
Each
MYR18,204.13
In Stock
ABB 100A Tag Fuse, 150 x 40 x 72mm, 500V
  • RS Stock No. 251-3474
  • Mfr. Part No. 1SCA022627R5380
1 Box of 3
MYR369.36
Temporarily out of stock
Better World
Siemens SIRIUS Electronic Circuit Breaker 6.3A 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 160-040
  • Mfr. Part No. 3RV2021-1GA10-0DA0
Each
MYR704.59
In Stock
Better World
Schneider Electric Busbar Trunking Fixing Bracket, Canalis KNB Series
  • RS Stock No. 248-4074
  • Mfr. Part No. KNB160ZF1
Each (In a Pack of 10)
MYR38.219
Temporarily out of stock
Better World
Schneider Electric TeSys Deca Motor Protection Circuit Breaker - 3 Pole 690V Voltage Rating, 40A Current Rating
  • RS Stock No. 256-4179
  • Mfr. Part No. GV3P406
Each
MYR2,424.07
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 3+N, 32A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 209-6551
  • Mfr. Part No. 5SL4632-8
Each
MYR1,131.19
In Stock
Better World
Schneider Electric Multi 9 C60SP MCB, 2P, 10A Curve B, 440V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 211-2339
  • Mfr. Part No. M9F21210
Each
MYR456.10
In Stock
Schurter 8040 Screw Mount Fuse Clip for 17.8 x 11.1mm
  • RS Stock No. 221-5663
  • Mfr. Part No. 8040.2002.01
Each (In a Pack of 5)
MYR4.228
Temporarily out of stock
Siemens, SENTRON MCCB 3P 150A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 147-383
  • Mfr. Part No. 3VA5215-0BB31-0AA0
Each
MYR4,335.22
Temporarily out of stock
Siemens, SENTRON MCCB 3P 800A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-4854
  • Mfr. Part No. 3VA2580-6KQ32-0AA0
Each
MYR30,296.67
In Stock
WAGO 30A Fuse Holder for 10 x 38mm Fuse, 1P, 24V dc
  • RS Stock No. 279-1656
  • Mfr. Part No. 811-414
Each
MYR157.09
1
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