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.

50914 Products showing for Fuses & Circuit Breakers

486 of 999+
Better World
  • RS Stock No. 212-1631
  • Mfr. Part No. 2CDS252280R0255
Each
£40.04(exc. VAT)
  • RS Stock No. 287-9644
  • Mfr. Part No. 1250A-4S-600
Each (In a Box of 54)
£448.315(exc. VAT)
  • RS Stock No. 647-8409P
  • Mfr. Part No. MF-USMF050-2
Each (Supplied on a Reel)
£0.233(exc. VAT)
Better World
  • RS Stock No. 219-8897
  • Mfr. Part No. KNA63ED4303
Each
£276.85(exc. VAT)
Better World
  • RS Stock No. 270-4096
  • Mfr. Part No. 3VA2116-7HN32-0AA0
Each
£954.83(exc. VAT)
  • RS Stock No. 174-0746
  • Mfr. Part No. 0453010.MR
Each (In a Pack of 5)
£1.50(exc. VAT)
  • RS Stock No. 228-899
  • Mfr. Part No. HLS
1 Pack of 10
£109.69(exc. VAT)
Better World
  • RS Stock No. 271-9571
  • Mfr. Part No. 3VA10252ED420AA0
Each
£195.72(exc. VAT)
  • RS Stock No. 339-363
  • Mfr. Part No. SEA9BPN25014S8
Each
£4,677.03(exc. VAT)
  • RS Stock No. 738-2930P
  • Mfr. Part No. 045101.6MRL
Each (Supplied on a Reel)
£0.931(exc. VAT)
  • RS Stock No. 899-1831
  • Mfr. Part No. 2EU16
Each
£29.51(exc. VAT)
  • RS Stock No. 236-8715
  • Mfr. Part No. 1694-PMD233-CL2
Each
£86.04(exc. VAT)
  • RS Stock No. 179-2991
  • Mfr. Part No. 2081890000
Each
£25.62(exc. VAT)
  • RS Stock No. 182-1398
  • Mfr. Part No. 170M1563D
Each (In a Box of 10)
£56.941(exc. VAT)
  • RS Stock No. 144-4706
  • Mfr. Part No. NFN200
Each
£101.52(exc. VAT)
Better World
  • RS Stock No. 209-6029
  • Mfr. Part No. 5SY6516-7
Each
£46.06(exc. VAT)
  • RS Stock No. 610-401
  • Mfr. Part No. 5SY7525-8
Each
£80.25(exc. VAT)
Better World
  • RS Stock No. 772-1344
  • Mfr. Part No. 5SY4232-6
Each
£54.31(exc. VAT)
  • RS Stock No. 251-164
  • Mfr. Part No. 193532 PXK-C20/1N/003-F
Each
£210.03(exc. VAT)
  • RS Stock No. 627-151
  • Mfr. Part No. 3NC1405
1 Pack of 10
£95.04(exc. VAT)
Results per page