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.

50914 Products showing for Fuses & Circuit Breakers

454 of 999+
Better World
  • RS Stock No. 210-1704
  • Mfr. Part No. 3VA2040-5KP36-0AA0
Each
£844.67(exc. VAT)
  • RS Stock No. 288-0884
  • Mfr. Part No. 2CDS253001R0165
Each
£62.87(exc. VAT)
  • RS Stock No. 232-0212
  • Mfr. Part No. 1SDA066799R1 XT1B 160 TMD 16A FF
Each
£204.00(exc. VAT)
  • RS Stock No. 246-2329
  • Mfr. Part No. 2CCF800241R0001
Each
£10.98(exc. VAT)
  • RS Stock No. 251-547
  • Mfr. Part No. 215657 EVG-2PHAS/10MODUL/HI
Each
£8.93(exc. VAT)
  • RS Stock No. 182-1441
  • Mfr. Part No. 170M1572D
Each (In a Box of 6)
£77.653(exc. VAT)
  • RS Stock No. 237-5961
  • Mfr. Part No. 1SDA054320R1 T5N400 FF PR222-LSI 320A
Each
£798.38(exc. VAT)
  • RS Stock No. 173-9812
  • Mfr. Part No. 4400.0008
Each (In a Box of 100)
£5.617(exc. VAT)
  • RS Stock No. 176-879
  • Mfr. Part No. 2CCF544310E0630 - F404A-K63/0.03,2CC
Each
£326.98(exc. VAT)
  • RS Stock No. 339-630
  • Mfr. Part No. SEA9BPN16TN
Each
£357.42(exc. VAT)
Better World
  • RS Stock No. 282-6224
  • Mfr. Part No. PV-160A-2XL-3BU-15
Each
£364.09(exc. VAT)
  • RS Stock No. 230-1078
  • Mfr. Part No. 264747 PLG4-C20/1N
Each
£10.09(exc. VAT)
Better World
  • RS Stock No. 241-4441
  • Mfr. Part No. 5SU1154-6KK10
Each
£142.54(exc. VAT)
  • RS Stock No. 207-2755
  • Mfr. Part No. 2906844
Each
£25.26(exc. VAT)
  • RS Stock No. 256-151
  • Mfr. Part No. 236172 PXL-C50/1N
Each
£83.08(exc. VAT)
  • RS Stock No. 237-5055
  • Mfr. Part No. 2CSR252101R1504
Each
£285.41(exc. VAT)
Better World
  • RS Stock No. 211-2645
  • Mfr. Part No. LV429312
Each
£10.54(exc. VAT)
  • RS Stock No. 869-7416P
  • Mfr. Part No. TRF250-120
Each (Supplied in a Bag)
£0.67(exc. VAT)
Better World
  • RS Stock No. 791-3483
  • Mfr. Part No. A9F55140
Each
£30.25(exc. VAT)
  • RS Stock No. 287-9631
  • Mfr. Part No. 1250A-2S-600
Each
£298.89(exc. VAT)
Results per page