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

141 / 999+
RS PRO 20A Yellow Blade Car Fuse, 32V dc
  • RS Stock No. 563-560
Each (In a Pack of 10)
MYR3.366
Eaton 30A Bolt In Mount 6.3 x 32mm Fuse Block, 300V ac/dc
  • RS Stock No. 852-7231
  • Mfr. Part No. S-8301-1-R
Each
MYR34.25
Eaton 250A NH Fuse, NH1, 500V
  • RS Stock No. 703-8715
  • Mfr. Part No. 250NHG1B
Each
MYR72.40
Better World
ABB, XT2L MCCB 3P 160A, Fixed Mount
  • RS Stock No. 236-7567
  • Mfr. Part No. 1SDA067923R1 XT2L 160 Ekip I 160A FF
Each
MYR4,818.32
Eaton 400A British Standard Fuse, B4, 415V ac, 110mm
  • RS Stock No. 161-060
  • Mfr. Part No. ED400
Each
MYR171.95
Eaton 1A T Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 848-4131
  • Mfr. Part No. LP-CC-1
Each
MYR312.02
Better World
Schneider Electric TeSys Thermal Circuit Breaker - GV4LE 3 Pole 690V ac Voltage Rating, 3.5A Current Rating
  • RS Stock No. 175-1455
  • Mfr. Part No. GV4LE03N6
Each
MYR2,688.85
Siemens 10A NH Fuse, NH000, 500V ac
  • RS Stock No. 397-464
  • Mfr. Part No. 3NA3803
Each (In a Pack of 3)
MYR51.857
Schneider Electric, ComPacT MCCB 3P 600A, Fixed Mount
  • RS Stock No. 260-8203
  • Mfr. Part No. C63F3TM600D
Each
MYR19,027.22
Eaton 15A PCB Mount 5 x 20mm Fuse Block, 250V
  • RS Stock No. 233-0609
  • Mfr. Part No. BK4-HTC-528M
Each (In a Pack of 10)
MYR5.722
Schneider Electric Acti 9 MCB, 3P, 16A Curve C, 230V AC, 7.5 kA Breaking Capacity
  • RS Stock No. 200-6158
  • Mfr. Part No. A9PA2716
Each
MYR1,080.97
Better World
Schneider Electric Busbar End Feed Unit
  • RS Stock No. 219-8906
  • Mfr. Part No. KSA100AB4
Each
MYR2,873.06
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 40A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3354
  • Mfr. Part No. A9F54240
Each
MYR655.19
Eaton 25A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7421
  • Mfr. Part No. ABC-25-R
Each
MYR22.72
SIBA 325A White Automotive Car Fuse, 80V dc
  • RS Stock No. 161-1837
  • Mfr. Part No. 9005805.325
Each
MYR29.31
Mersen 63A D02 Neozed Fuse, gG, 400V ac
  • RS Stock No. 377-0314
  • Mfr. Part No. C201873
Each (In a Pack of 5)
MYR14.416
Mersen 5A T Fibreglass Cartridge Fuse, 10 x 38mm
  • RS Stock No. 914-4339
  • Mfr. Part No. ATDR5
Each
MYR113.41
Better World
Schneider Electric iC60 RCD, 25A, 4 Pole, 300mA, Type AC
  • RS Stock No. 734-9191
  • Mfr. Part No. A9Q14425
Each
MYR1,641.36
Mersen 50A Rail Mount Fuse Holder for 14 x 51mm Fuse, 3P, 690V ac
  • RS Stock No. 768-3769
  • Mfr. Part No. S331032
Each
MYR266.54
Siemens SENTRON Terminal Cover for use with 3VA20/21/22
  • RS Stock No. 159-471
  • Mfr. Part No. 3VA9163-0KB04
Each
MYR223.13
1
141
2329
Results per page

Related links