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.

50957 Products showing for Fuses & Circuit Breakers

712 of 999+
  • RS Stock No. 801-6987
  • Mfr. Part No. 0914125
Each
£91.52
  • RS Stock No. 230-055
  • Mfr. Part No. 110891 NZMN3-VE250-T
Each
£2,281.46
  • RS Stock No. 599-739
  • Mfr. Part No. CDB725F
Each
£837.99
  • RS Stock No. 521-2804
Each
£60.75
Better World
  • RS Stock No. 219-8426
  • Mfr. Part No. NLJF36250U31XTW
Each
£2,562.70
  • RS Stock No. 251-915
  • Mfr. Part No. 211805 AZ-2-C100
Each
£259.35
  • RS Stock No. 271-9784
  • Mfr. Part No. 3VA1116-5EF36-0DD0
Each
£735.96
  • RS Stock No. 786-5621
  • Mfr. Part No. 4 012 12
Each
£87.84
  • RS Stock No. 328-325
  • Mfr. Part No. 5SM2325-6
Each
£215.69
  • RS Stock No. 237-6195
  • Mfr. Part No. 1SDA066985R1 XT2-XT4 W
Each
£77.42
  • RS Stock No. 260-9442
  • Mfr. Part No. C10F4TM032
Each
£609.78
Better World
  • RS Stock No. 219-9285
  • Mfr. Part No. A9F94325
Each
£303.34
  • RS Stock No. 144-4886
  • Mfr. Part No. BPC863
Each
£368.60
  • RS Stock No. 173-7971
  • Mfr. Part No. 0090.0030
Each (In a Box of 10)
£17.295
  • RS Stock No. 200-776
  • Mfr. Part No. 2CDS273061R0338
Each
£340.98
  • RS Stock No. 256-074
  • Mfr. Part No. 265823 NZMH2-4-A40
Each
£589.29
  • RS Stock No. 230-2942
  • Mfr. Part No. 3NA6105
Each (In a Pack of 3)
£15.103
Better World
  • RS Stock No. 236-6632
  • Mfr. Part No. 1SDA068178R1 XT4N 250 BLOC FF
Each
£413.85
  • RS Stock No. 187-5240
  • Mfr. Part No. 5ST3788-0
Each
£2.59
  • RS Stock No. 414-718
  • Mfr. Part No. GSA5
Each (In a Pack of 5)
£15.344
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