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.

51028 Products showing for Fuses & Circuit Breakers

618 of 999+
  • RS Stock No. 337-4916
  • Mfr. Part No. 0KLK010.T
Each (In a Pack of 5)
£29.75
  • RS Stock No. 161-970
  • Mfr. Part No. 3VA9503-0SB20
Each
£46.05
  • RS Stock No. 232-0099
  • Mfr. Part No. 1SDA054478R1 T5N400 FF TMA 400A
Each
£1,535.75
  • RS Stock No. 269-584
  • Mfr. Part No. 3VA5280-5EC31-1AA0
Each
£564.17
  • RS Stock No. 268-043
  • Mfr. Part No. 3VA5245-7ED31-1AA0
Each
£647.80
  • RS Stock No. 261-2873
  • Mfr. Part No. 140G-G-RMB
Each
£101.64
  • RS Stock No. 213-0407
  • Mfr. Part No. 3RA6823-0AB
Each
£136.98
  • RS Stock No. 328-471
  • Mfr. Part No. 5SV3347-4KK60
Each
£1,998.59
Better World
  • RS Stock No. 260-579
  • Mfr. Part No. 3VA6340-5JP41-0AA0
Each
£2,303.47
  • RS Stock No. 201-6970
  • Mfr. Part No. 2CSR275180R1065 DS201 M B6 A30
Each
£139.96
  • RS Stock No. 254-093
  • Mfr. Part No. 259430 NZM2/3-XHIV
Each
£66.16
  • RS Stock No. 266-753
  • Mfr. Part No. 3VW9011-0AE06
Each
£215.96
Better World
  • RS Stock No. 243-6172
  • Mfr. Part No. 5SU1324-7FR06
Each
£156.02
  • RS Stock No. 265-521
  • Mfr. Part No. 3VW9011-0AL78
Each
£158.43
Better World
  • RS Stock No. 211-5985
  • Mfr. Part No. 3VA1112-5EF42-0AA0
Each
£537.08
  • RS Stock No. 237-5138
  • Mfr. Part No. 2CSR272001R1165 DS202 M AC-B16/0.03
Each
£185.01
Better World
  • RS Stock No. 209-6764
  • Mfr. Part No. 3VA1116-5EF42-0AA0
Each
£652.93
  • RS Stock No. 148-655
  • Mfr. Part No. 3VA5145-6ED21-0AA0
Each
£234.14
  • RS Stock No. 189-5332
  • Mfr. Part No. X1062689 / CMC81I
Each
£10.44
  • RS Stock No. 201-075
  • Mfr. Part No. 2CDS273337R0014
Each
£158.22
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