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.

51028 Products showing for Fuses & Circuit Breakers

2549 of 999+
  • RS Stock No. 259-4704
  • Mfr. Part No. 1SDA072982R1
Each
£7,281.89(exc. VAT)
  • RS Stock No. 237-6173
  • Mfr. Part No. 1SDA066958R1 FB XT1 4PCS
Each
£24.15(exc. VAT)
Better World
  • RS Stock No. 282-6250
  • Mfr. Part No. PV-500A-3L-B
Each
£657.10(exc. VAT)
Better World
  • RS Stock No. 270-4630
  • Mfr. Part No. 3VA2140-6HM46-0AA0
Each
£831.99(exc. VAT)
  • RS Stock No. 259-3648
  • Mfr. Part No. 1SDA071622R1
Each
£5,877.84(exc. VAT)
  • RS Stock No. 703-8415P
  • Mfr. Part No. C14G6
Each (Supplied in a Box)
£1.905(exc. VAT)
Better World
  • RS Stock No. 269-916
  • Mfr. Part No. 3VA6115-6HM31-2AA0
Each
£1,265.38(exc. VAT)
  • RS Stock No. 252-244
  • Mfr. Part No. 192354 NZMN3-PX250
Each
£2,146.26(exc. VAT)
  • RS Stock No. 147-329
  • Mfr. Part No. 3VA5222-6GD41-0AA0
Each
£1,219.91(exc. VAT)
  • RS Stock No. 259-3565
  • Mfr. Part No. 1SDA071543R1
Each
£6,676.22(exc. VAT)
  • RS Stock No. 254-762
  • Mfr. Part No. 250NHG1BI-400
1 Pack of 3
£25.77(exc. VAT)
  • RS Stock No. 854-8998
  • Mfr. Part No. LPJ-8SP
Each
£41.74(exc. VAT)
  • RS Stock No. 270-7948
  • Mfr. Part No. 3404.0021.22
Each
£0.77(exc. VAT)
  • RS Stock No. 246-888
  • Mfr. Part No. 192276 NZMH3-PX630-TAZ-AVE
Each
£5,451.53(exc. VAT)
Better World
  • RS Stock No. 236-7407
  • Mfr. Part No. 1SDA067652R1 XT2L 160 TMD 3.2A FF
Each
£435.07(exc. VAT)
  • RS Stock No. 783-3242
  • Mfr. Part No. 70-007-33/4A
Each (In a Pack of 10)
£0.241(exc. VAT)
  • RS Stock No. 169-9414
  • Mfr. Part No. S506-6.3-R
1 Bag of 1000
£116.29(exc. VAT)
  • RS Stock No. 738-3052
  • Mfr. Part No. 0251.750MRT1L
Each (In a Pack of 10)
£0.471(exc. VAT)
  • RS Stock No. 201-6889
  • Mfr. Part No. 2CSR275080R3254
Each
£112.03(exc. VAT)
  • RS Stock No. 147-788
  • Mfr. Part No. 3VA5222-5EC31-2AA0
Each
£937.28(exc. VAT)