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.

51057 Products showing for Fuses & Circuit Breakers

2553 of 999+
  • RS Stock No. 602-121
  • Mfr. Part No. MMN240
Each
£284.71
  • RS Stock No. 629-313
  • Mfr. Part No. 8GK6735-6KK13
Each
£209.95
  • RS Stock No. 664-300
  • Mfr. Part No. 5SY4335-7
Each
£160.83
  • RS Stock No. 610-305
  • Mfr. Part No. 5SY4363-5
Each
£311.65
Better World
  • RS Stock No. 245-205
  • Mfr. Part No. 3VA6225-5JT31-2AA0
Each
£1,970.06
  • RS Stock No. 610-643
  • Mfr. Part No. 5SY7108-8
Each
£40.08
Better World
  • RS Stock No. 260-483
  • Mfr. Part No. 3VA6325-6HM31-2AA0
Each
£1,977.64
  • RS Stock No. 627-351
  • Mfr. Part No. 8PQ6000-5BA80
Each
£395.39
  • RS Stock No. 610-340
  • Mfr. Part No. 5SY8215-7
Each
£110.00
  • RS Stock No. 249-487
  • Mfr. Part No. 3VA6580-5HN42-2AA0
Each
£4,769.03
  • RS Stock No. 629-310
  • Mfr. Part No. 8GK6731-6KK33
Each
£193.84
  • RS Stock No. 599-795
  • Mfr. Part No. NKN225
Each
£118.10
  • RS Stock No. 664-347
  • Mfr. Part No. 5SY5450-7
Each
£445.82
  • RS Stock No. 629-062
  • Mfr. Part No. 8GK9902-0KK53
Each
£471.61
  • RS Stock No. 653-925
  • Mfr. Part No. KSA1000DLF401
Each
£1,804.94
  • RS Stock No. 655-279
  • Mfr. Part No. C100N320FM
Each
£4,114.39
  • RS Stock No. 246-633
  • Mfr. Part No. 187413 FRCMM-16/4/01-G/F
Each
£255.95
  • RS Stock No. 608-680
  • Mfr. Part No. 3NB1020-1KK10
1 Pack of 3
£180.61
  • RS Stock No. 522-986
  • Mfr. Part No. 0160002.MR
1 Pack of 1000
£4,034.18
  • RS Stock No. 627-441
  • Mfr. Part No. 8PQ6000-7BA07
Each
£435.55