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

318 / 999+
In Stock
Eaton 100A Offset Tag Fuse, 440V ac
  • RS Stock No. 182-1643
  • Mfr. Part No. XS100
Each
MYR392.06
Temporarily out of stock
Eaton Fuse Holder Cover
  • RS Stock No. 245-819
  • Mfr. Part No. 1319435 QSAFCOVER63N1-125N1
Each
MYR412.27
In Stock
RS PRO Thermal Circuit Breaker - 2 Pole 250V ac Voltage Rating, 1.6A Current Rating
  • RS Stock No. 774-0083
Each
MYR14.35
Temporarily out of stock
Schneider Electric Acti9 Acti9 Reflex MCB, 2P, 25A Curve D, 230V AC, 24V DC, 10 KA Breaking Capacity
  • RS Stock No. 205-158
  • Mfr. Part No. A9C63225
Each
MYR6,020.51
In Stock
Siemens 50A Cartridge Fuse, 14 x 51mm
  • RS Stock No. 396-045
  • Mfr. Part No. 3NC1450
Each (In a Pack of 10)
MYR146.88
In Stock
Schneider Electric RCBO, 32A Current Rating, 4P Poles, 30mA Trip Sensitivity, Type AC, Acti9 Range
  • RS Stock No. 276-8720
  • Mfr. Part No. A9D57432
Each
MYR4,016.15
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
Siemens SENTRON 5SL66 MCB, 4P, 13A Curve B, 440V AC, 62.5V DC, 6 kA Breaking Capacity
  • RS Stock No. 328-385
  • Mfr. Part No. 5SL6613-6
Each
MYR521.45
In Stock
Eaton 15A Ceramic Cartridge Fuse, 10 x 26mm
  • RS Stock No. 417-335
  • Mfr. Part No. C1515
Each (In a Pack of 5)
MYR18.04
Temporarily out of stock
Allen Bradley 140MT Lockable Twist Knob for use with Motor Circuit Protectors
  • RS Stock No. 273-2290
  • Mfr. Part No. 140MT-C-KB
Each
MYR19.38
Temporarily out of stock
Schneider Electric ComPacT Control Unit for use with Compact NS630b to NS3200
  • RS Stock No. 341-228
  • Mfr. Part No. C60FM
Each
MYR7,878.61
Temporarily out of stock
Schneider Electric VigiPacT Residual Current Relay for use with TB35P, TB60, TB60P, TB120, TB210, VigiPacT TB35
  • RS Stock No. 205-351
  • Mfr. Part No. LV481010
Each
MYR15,031.45
In Stock
Better World
Schneider Electric Multi 9 MCB, 2P, 10A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 219-9126
  • Mfr. Part No. M9F22210
Each
MYR949.25
In Stock
Wurth Elektronik Plastic Base Mount Fuse Holder Cover for 5 x 20mm Fuse
  • RS Stock No. 893-0592
  • Mfr. Part No. 696120004001
Each (In a Pack of 10)
MYR1.376
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 209-5089
  • Mfr. Part No. 3VA2010-5KP42-0AA0
Each
MYR6,996.96
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 1kA, Breaking Capacity 30 kA, Fixed Mount
  • RS Stock No. 428-730
  • Mfr. Part No. C100N42EFM
Each
MYR65,073.83
In Stock
ABB Current Transformer for use with S4, S5, S6, S7, T1, T2, T3, T4, T5, T6, T7, XT2, XT3, XT4, XT7-XT7M, XXT7-XT7M
  • RS Stock No. 250-4511
  • Mfr. Part No. 1SDA037395R1
Each
MYR2,961.52
Temporarily out of stock
ABB S800S MCB, 3P, 50A Curve K, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-719
  • Mfr. Part No. 2CCS863001R0577
Each
MYR2,064.81
Temporarily out of stock
Schneider Electric RCBO, 10A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type AC, Acti9 Range
  • RS Stock No. 276-9124
  • Mfr. Part No. A9D07210
Each
MYR2,983.13
Temporarily out of stock
Siemens 350A Centred Tag Fuse, NH2, 690V
  • RS Stock No. 210-6960
  • Mfr. Part No. 3NE1331-2
Each (In a Pack of 3)
MYR1,925.55
1
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