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.

50973 Products showing for Fuses & Circuit Breakers

683 of 999+
  • RS Stock No. 245-019
  • Mfr. Part No. A9D01810
Each
£175.71
  • RS Stock No. 282-6194
  • Mfr. Part No. FWE-150A
Each
£162.22
  • RS Stock No. 229-459
  • Mfr. Part No. 109684 NZMH3-S250
Each
£2,058.67
  • RS Stock No. 428-895
  • Mfr. Part No. 33032
Each
£350.76
  • RS Stock No. 148-308
  • Mfr. Part No. 3VA5125-4ED41-0AA0
Each
£266.70
Better World
  • RS Stock No. 271-9612
  • Mfr. Part No. 3VA10634ED360AA0
Each
£187.37
  • RS Stock No. 250-8616
  • Mfr. Part No. LF402G
Each (In a Pack of 10)
£3.93
  • RS Stock No. 251-896
  • Mfr. Part No. 20GN02
1 Pack of 50
£42.52
  • RS Stock No. 738-3065
  • Mfr. Part No. 0251.375MRT1L
Each (In a Pack of 10)
£1.113
  • RS Stock No. 263-976
  • Mfr. Part No. 3VA9478-0DK82
Each
£350.06
  • RS Stock No. 130-747
  • Mfr. Part No. C12E34V160L
Each
£2,153.63
  • RS Stock No. 922-8676
  • Mfr. Part No. 235441 PFIM-40/4/03-A-MW
Each
£158.20
  • RS Stock No. 654-790
  • Mfr. Part No. A9DC3732
Each
£177.56
  • RS Stock No. 269-794
  • Mfr. Part No. 3VA5250-7ED31-1AA0
Each
£647.80
  • RS Stock No. 204-222
  • Mfr. Part No. 2CDS381103R0218
Each
£98.29
  • RS Stock No. 123-272
  • Mfr. Part No. 170732 FRBM6-C40/2/03-A
Each
£139.37
  • RS Stock No. 181-8555
  • Mfr. Part No. 16D27
1 Box of 25
£44.98
  • RS Stock No. 230-988
  • Mfr. Part No. 107578 NS2-160-BT-NA
Each
£653.06
  • RS Stock No. 207-235
  • Mfr. Part No. KSA800EV4254
Each
£2,232.34
  • RS Stock No. 177-8105
Each (In a Pack of 20)
£0.462
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