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

256 / 999+
Temporarily out of stock
Eaton 80A Tag Fuse, 189 x 46.5 x 46.5mm, 1kV, 189mm
  • RS Stock No. 282-6254
  • Mfr. Part No. PV-80A-01XL
Each
MYR1,784.67
Temporarily out of stock
Siemens SENTRON Connection Unit for use with Circuit Breaker 3WL10 / 3VA27
  • RS Stock No. 265-520
  • Mfr. Part No. 3VW9011-0AL32
1 Kit
MYR1,173.27
In Stock
Littelfuse 20A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 769-0091
  • Mfr. Part No. 0314020.HXP
Each (In a Pack of 5)
MYR7.946
In Stock
Better World
Siemens, SENTRON MCCB 3P 160A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 209-5187
  • Mfr. Part No. 3VA2216-5MN32-0AA0
Each
MYR4,644.45
Temporarily out of stock
ABB SMISSLINE TP MCB, 2P, 13A Curve D, 400V AC
  • RS Stock No. 246-2566
  • Mfr. Part No. 2CCS572001R0131
Each
MYR435.40
In Stock
ABB 24 → 36V ac/dc Undervoltage Release Circuit Trip for use with S800PV, S800S, S800N, S800C, S800B, S800HV,
  • RS Stock No. 435-425
  • Mfr. Part No. 2CCS800900R0241 S800-UVR36
Each
MYR471.67
Temporarily out of stock
ABB 4A Tag Fuse, 79 x 21 x 53mm, 500V
  • RS Stock No. 251-3424
  • Mfr. Part No. 1SCA022627R0310
1 Box of 9
MYR332.29
In Stock
Littelfuse TR5 Series Thermoplastic PCB Mount Fuse Holder Cover for 8.5 x 8mm Fuse
  • RS Stock No. 769-0177
  • Mfr. Part No. 57500000001
Each (In a Pack of 10)
MYR2.261
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 50A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 211-3740
  • Mfr. Part No. 3VA1150-6EE46-0AA0
Each
MYR2,304.84
In Stock
ABB RCBO, 63A Current Rating, 3P Poles, Type C
  • RS Stock No. 237-5073
  • Mfr. Part No. 2CSR253001R1634
Each
MYR2,128.79
In Stock
RS PRO 1.25A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 911-3483
Each (In a Pack of 10)
MYR0.765
Temporarily out of stock
Allen Bradley, 140G MCCB 3P 125A, Module Frame Mount
  • RS Stock No. 261-2821
  • Mfr. Part No. 140G-G2C3-C45
Each
MYR1,099.45
In Stock
Mersen Surge Protector, 50kA, 1000V (Volts), DIN Rail Mount
  • RS Stock No. 361-604
  • Mfr. Part No. 44020001
Each
MYR161.69
In Stock
Eaton 20A British Standard Fuse, F1, 550V ac
  • RS Stock No. 413-513
  • Mfr. Part No. NSD20
Each (In a Pack of 5)
MYR30.884
Temporarily out of stock
Schneider Electric Acti9 3 Phase Distribution Board, 24 Way, 250 A
  • RS Stock No. 336-638
  • Mfr. Part No. SEA9BPN24
Each
MYR16,249.18
Temporarily out of stock
Schneider Electric Chassis for use with Compact NS 1600, Masterpact NT 16
  • RS Stock No. 247-1865
  • Mfr. Part No. 33726
Each
MYR26,210.16
Temporarily out of stock
Better World
ABB System Pro M Compact S200M MCB, 2P, 16A Curve D
  • RS Stock No. 231-9725
  • Mfr. Part No. 2CDS272001R0161 S202M D 16A - 15 KA
1 Box of 1
MYR301.50
Temporarily out of stock
ABB S801N MCB, 1P, 6A Curve B, 400V AC, 36 kA Breaking Capacity
  • RS Stock No. 140-844
  • Mfr. Part No. 2CCS891001R0135
Each
MYR387.41
In Stock
Better World
Schneider Electric, ComPacT NSX MCCB 4P 100A, Fixed Mount
  • RS Stock No. 254-6291
  • Mfr. Part No. C10F6TM100
Each
MYR4,397.33
In Stock
Siemens 10A D01 Neozed Fuse, gG, 400V ac
  • RS Stock No. 622-1051
  • Mfr. Part No. 5SE2310
Each (In a Pack of 10)
MYR8.347
1
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