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
Fuses - PCB
Fuses - PCB

46580 Products showing for Fuses & Circuit Breakers

32 / 999+
In Stock
RS PRO 2A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 668-5991
Each (In a Pack of 10)
MYR1.976
In Stock
Schurter 12A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 703-2666
  • Mfr. Part No. 8020.0603.G
Each (In a Pack of 10)
MYR4.864
Temporarily out of stock
Hager RCCB, 40A, 2 Pole, 30mA
  • RS Stock No. 144-4887
  • Mfr. Part No. CDC140F
Each
MYR1,224.05
In Stock
Siemens 20A Diazed Fuse, gG, 500/440V ac/dc
  • RS Stock No. 163-281
  • Mfr. Part No. 5SB2711
1 Pack of 25
MYR143.62
Limited stock
ETI 10A DI Diazed Fuse, E16 Thread Size, gG - gL, 500V ac
  • RS Stock No. 417-846
  • Mfr. Part No. 2311404
Each (In a Pack of 5)
MYR6.216
In Stock
Siemens 20A DII Diazed Fuse, E27 Thread Size, gR, 500V
  • RS Stock No. 203-3953
  • Mfr. Part No. 5SD430
Each (In a Pack of 5)
MYR56.786
In Stock
Eaton 25A Clear Blade Car Fuse, 32V dc
  • RS Stock No. 852-7354
  • Mfr. Part No. ATC-25
Each
MYR4.90
In Stock
Bourns Thermal Fuse +90°C 60 A, 28V
  • RS Stock No. 258-6359
  • Mfr. Part No. AC90ABD
Each
MYR8.20
In Stock
Better World
ABB System Pro M Compact S200 MCB, 2P, 100A Curve C, 440V AC, 110V DC, 6 kA Breaking Capacity
  • RS Stock No. 231-9677
  • Mfr. Part No. 2CDS252001R0824 S202-C100 6kA
1 Box of 1
MYR677.89
Temporarily out of stock
Better World
Siemens 3VA9 RCD, 250A, 3 Pole, Type A
  • RS Stock No. 210-3528
  • Mfr. Part No. 3VA9223-0RL30
Each
MYR7,339.20
In Stock
Weidmuller Electronic Circuit breaker 25mA 24V AMG ELM, 1 channels , DIN Rail Mount
  • RS Stock No. 179-2993
  • Mfr. Part No. 2080410000
Each
MYR248.04
In Stock
Littelfuse 6.3A PCB Mount 5 x 20mm Cartridge Fuse Block, 250V
  • RS Stock No. 769-0149
  • Mfr. Part No. 64600001003
Each (In a Pack of 5)
MYR3.268
In Stock
Better World
Schneider Electric Spreader for use with Compact Nsx 400/630, Easypact Cvs 400/630
  • RS Stock No. 221-1235
  • Mfr. Part No. LV432492
Each
MYR802.28
In Stock
Schneider Electric 100V ac Shunt Trip Circuit Trip for use with IC60, IID, ISW-NA
  • RS Stock No. 734-9021
  • Mfr. Part No. A9A26946
Each
MYR533.08
In Stock
Legrand DX3 RCD, 25A, 1+N Pole, 30mA, Type AC
  • RS Stock No. 732-0023
  • Mfr. Part No. 4 115 04
Each
MYR706.13
In Stock
RS PRO Earthing Strap Copper 150 x 13mm Diameter
  • RS Stock No. 264-9225
Each (In a Pack of 5)
MYR32.95
In Stock
ETA Thermal Circuit Breaker - 104-PR Single Pole 240V Voltage Rating PCB Mount, 1.5A Current Rating
  • RS Stock No. 728-8604
  • Mfr. Part No. 104-PR-1.5A
Each
MYR85.66
In Stock
Schneider Electric 220 - 440V ac Earth Leakage Add-on Protection Module Circuit Trip for use with ComPact (ComPact
  • RS Stock No. 276-9255
  • Mfr. Part No. LV429489
Each
MYR8,112.64
In Stock
Hager NFN MCB, 2P, 10A Curve C, 240 → 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4712
  • Mfr. Part No. NFN210
Each
MYR481.97
Temporarily out of stock
RS PRO MCB, 1P, 10A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0195
Each
MYR54.92
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