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.

50915 Products showing for Fuses & Circuit Breakers

212 of 999+
  • RS Stock No. 647-8617P
  • Mfr. Part No. MF-R500
Each (Supplied in a Bag)
£0.336(exc. VAT)
Better World
  • RS Stock No. 874-4281
  • Mfr. Part No. 3VA1163-3EF36-0AA0
Each
£205.13(exc. VAT)
Better World
  • RS Stock No. 791-3310
  • Mfr. Part No. A9F54163
Each
£33.88(exc. VAT)
  • RS Stock No. 123-296
  • Mfr. Part No. 170748 FRBMM-C32/3/01-A
Each
£165.87(exc. VAT)
  • RS Stock No. 123-685
  • Mfr. Part No. 170850 FRBM6-B40/2/03-A
Each
£140.22(exc. VAT)
  • RS Stock No. 183-3709
  • Mfr. Part No. 2CSR255041R1164
Each
£107.02(exc. VAT)
  • RS Stock No. 777-7479
  • Mfr. Part No. 0034.3109
Each (In a Pack of 10)
£0.582(exc. VAT)
  • RS Stock No. 655-449
  • Mfr. Part No. A9Z64263
Each
£1,075.40(exc. VAT)
  • RS Stock No. 288-4611
  • Mfr. Part No. JF 16-100 M10
Each
£4.31(exc. VAT)
  • RS Stock No. 222-8513
  • Mfr. Part No. SEE120B03
Each
£137.42(exc. VAT)
  • RS Stock No. 848-4068
  • Mfr. Part No. JJN-80
Each
£66.60(exc. VAT)
  • RS Stock No. 260-696
  • Mfr. Part No. TIS63
1 Pack of 20
£319.24(exc. VAT)
  • RS Stock No. 277-3905
Each (In a Pack of 5)
£0.264(exc. VAT)
Better World
  • RS Stock No. 232-0281
  • Mfr. Part No. 1SDA068475R1 XT4S 250 Ekip LS/I 250A FF
Each
£847.50(exc. VAT)
  • RS Stock No. 270-4866
  • Mfr. Part No. 3VA2580-7KQ32-0AA0
Each
£3,575.99(exc. VAT)
Better World
  • RS Stock No. 219-9159
  • Mfr. Part No. M9F42215
Each
£126.42(exc. VAT)
  • RS Stock No. 156-8636
  • Mfr. Part No. BAO63M100
Each
£13.55(exc. VAT)
Better World
  • RS Stock No. 211-2447
  • Mfr. Part No. M9F43220
Each
£119.69(exc. VAT)
  • RS Stock No. 728-8645
  • Mfr. Part No. 106-P10-000040-2A
Each
£14.70(exc. VAT)
  • RS Stock No. 339-615
  • Mfr. Part No. SEA9APN14
Each
£183.42(exc. VAT)
Results per page