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

161 / 999+
Better World
Schneider Electric Busbar End Feed Unit
  • RS Stock No. 219-8919
  • Mfr. Part No. KSA400AB4
Each
MYR12,419.58
Bourns 0.2A Resettable Fuse, 24V
  • RS Stock No. 647-8279P
  • Mfr. Part No. MF-NSMF020-2
Each (Supplied on a Reel)
MYR1.812
Better World
Siemens SENTRON 5SL6 MCB, 1+N, 13A Curve C, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 209-6556
  • Mfr. Part No. 5SL6013-7
Each
MYR254.84
Better World
Schneider Electric Acti 9 A9 MCB, 1P, 10A, Type AC, 6 kA Breaking Capacity
  • RS Stock No. 201-2253
  • Mfr. Part No. A9P44610
Each
MYR467.16
Eaton RCCB, 40A, 1+N Pole, 30mA, Type AC
  • RS Stock No. 667-0602
  • Mfr. Part No. 235394 PFIM-40/2/003-MW
Each
MYR867.05
PEIGNE EQUILIBRE RESI 13 MOD
  • RS Stock No. 250-4767
  • Mfr. Part No. 2CDL340001R1022
Each
MYR148.44
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 3 channels
  • RS Stock No. 259-4185
  • Mfr. Part No. 1SDA072300R1
Each
MYR57,242.68
Better World
Schneider Electric 25A Cartridge Fuse, 14 x 51mm
  • RS Stock No. 219-9065
  • Mfr. Part No. DF2EN25
Each (In a Pack of 10)
MYR149.36
Bourns 0.75A Resettable Fuse, 60V
  • RS Stock No. 647-8516P
  • Mfr. Part No. MF-R075
Each (Supplied in a Bag)
MYR1.604
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 1kA, Breaking Capacity 35 kA, Cable Mount
  • RS Stock No. 249-142
  • Mfr. Part No. 3VA6610-6KQ46-0AA0
Each
MYR64,095.24
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 40A, Breaking Capacity 7 kA
  • RS Stock No. 159-514
  • Mfr. Part No. 3VA1140-3EF36-0AA0
Each
MYR2,085.81
Better World
Schneider Electric Acti 9 iC60H MCB, 4P, 25A Curve C, 440V AC, 220 → 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3433
  • Mfr. Part No. A9F54425
Each
MYR981.82
Eaton 5A Bolt Fixing Photovoltaic Fuse, 10 x 38mm, 1000V dc, 49.7mm
  • RS Stock No. 703-8257
  • Mfr. Part No. PV-5A10-T
Each
MYR56.72
Siemens 25A NH Fuse, NH000, 500V ac
  • RS Stock No. 269-8336
  • Mfr. Part No. 3ND1810
Each (In a Pack of 3)
MYR118.547
Eaton Fuse Holder Back Stud
  • RS Stock No. 229-245
  • Mfr. Part No. 20BS
1 Pack of 10
MYR702.67
Siemens SENTRON 5SJ4140 MCB, 1P, 40A Curve B, 400V AC, 60V DC, 14 kA Breaking Capacity
  • RS Stock No. 299-903
  • Mfr. Part No. 5SJ4140-6HG40
Each
MYR473.04
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 55 kA, DIN Rail Mount
  • RS Stock No. 271-9677
  • Mfr. Part No. 3VA11105GD460AA0
Each
MYR3,321.33
Schneider Electric Acti 9 1 Phase Busbar, 230V ac, 9mm Pitch
  • RS Stock No. 191-9522
  • Mfr. Part No. A9XPN612
Each
MYR192.38
Siemens 35A DIII Diazed Fuse, E33 Thread Size, gR, 500V
  • RS Stock No. 203-3951
  • Mfr. Part No. 5SD450
Each (In a Pack of 5)
MYR76.808
Hager ARC MCB, 16A, 3 Breaking Capacity
  • RS Stock No. 602-197
  • Mfr. Part No. ARC716F
Each
MYR1,096.36
1
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