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

641 of 999+
  • RS Stock No. 229-159
  • Mfr. Part No. 20H07-660
1 Pack of 20
£682.70
  • RS Stock No. 787-4160
  • Mfr. Part No. 0297030.WXNV
Each (In a Pack of 10)
£0.228
Better World
  • RS Stock No. 225-8794
  • Mfr. Part No. 5SU1656-6KK20
Each
£123.56
  • RS Stock No. 258-416
  • Mfr. Part No. 271113 NZMN4-AEF1200-NA
Each
£6,355.44
  • RS Stock No. 300-095
  • Mfr. Part No. 5SJ4106-8HG41
Each
£48.37
  • RS Stock No. 188-6596
  • Mfr. Part No. J084004
Each (In a Pack of 10)
£3.073
Better World
  • RS Stock No. 260-597
  • Mfr. Part No. 3VA6340-7KM31-0AA0
Each
£2,530.76
  • RS Stock No. 251-5281
  • Mfr. Part No. SPD-10-275-G2
Each
£11.69
  • RS Stock No. 848-2722
  • Mfr. Part No. AGC-1/2-R
Each
£2.39
  • RS Stock No. 263-947
  • Mfr. Part No. 3VA9467-0HC35
Each
£977.54
Better World
  • RS Stock No. 157-129
  • Mfr. Part No. 3VA2163-5HK32-0AA0
Each
£417.57
  • RS Stock No. 125-110
  • Mfr. Part No. 178915 AVH-KLV
Each
£6.14
  • RS Stock No. 257-941
  • Mfr. Part No. 284162 XPL08
Each
£178.57
  • RS Stock No. 337-7943
  • Mfr. Part No. 155.0892.6121
Each
£9.22
  • RS Stock No. 123-031
  • Mfr. Part No. 171128 Z-BB/UL18/1P1MU/57
Each
£10.57
Better World
  • RS Stock No. 213-1104
  • Mfr. Part No. 5SY7640-7
Each
£166.25
  • RS Stock No. 258-466
  • Mfr. Part No. 279393 NZM2-XTVD-0
Each
£82.40
  • RS Stock No. 469-4306
  • Mfr. Part No. 80.063.4029.1
Each
£2.81
Better World
  • RS Stock No. 237-3306
  • Mfr. Part No. 2CDS253103R0608
Each
£227.89
  • RS Stock No. 299-845
  • Mfr. Part No. 5SJ4135-7HG40
Each
£72.64
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