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

377 of 999+
  • RS Stock No. 825-5560
  • Mfr. Part No. P1MB1PB25
Each
£16.72(exc. VAT)
  • RS Stock No. 117-706
  • Mfr. Part No. KKL 25
Each
£5.63(exc. VAT)
Better World
  • RS Stock No. 212-0284
  • Mfr. Part No. NHGF36100TW
Each
£630.25(exc. VAT)
  • RS Stock No. 232-2034
  • Mfr. Part No. 3NW3050-0HG
Each (In a Pack of 10)
£22.452(exc. VAT)
  • RS Stock No. 221-3665
Each
£11.67(exc. VAT)
  • RS Stock No. 258-999
  • Mfr. Part No. 278720 FAZ-B1,5/2
Each
£78.15(exc. VAT)
Better World
  • RS Stock No. 124-3220
  • Mfr. Part No. 5SY4563-7
Each
£77.67(exc. VAT)
  • RS Stock No. 169-9436
  • Mfr. Part No. S501-500-R
1 Bag of 1000
£421.89(exc. VAT)
  • RS Stock No. 231-212
  • Mfr. Part No. 108110 PKPM2-13/2/C/003-A
Each
£181.12(exc. VAT)
  • RS Stock No. 272-0287
  • Mfr. Part No. 8GK1061-4KK20
Each
£1,136.86(exc. VAT)
  • RS Stock No. 266-701
  • Mfr. Part No. 3VW9011-0AP13
Each
£100.13(exc. VAT)
  • RS Stock No. 204-7433
  • Mfr. Part No. Q82 A 90 05 100
Each
£5.61(exc. VAT)
Better World
  • RS Stock No. 212-0188
  • Mfr. Part No. GV7AC022
Each
£34.68(exc. VAT)
  • RS Stock No. 647-8140P
  • Mfr. Part No. MF-MSMF020-2
Each (Supplied on a Reel)
£0.236(exc. VAT)
  • RS Stock No. 257-230
  • Mfr. Part No. 3VA5340-5GF41-2AA0
Each
£1,710.54(exc. VAT)
  • RS Stock No. 258-6358
  • Mfr. Part No. AC90ABD
Each (In a Bag of 1000)
£0.716(exc. VAT)
  • RS Stock No. 203-2014
  • Mfr. Part No. 3NH3430
Each
£44.37(exc. VAT)
  • RS Stock No. 147-294
  • Mfr. Part No. 3VA5220-6GC41-2AA0
Each
£1,230.18(exc. VAT)
  • RS Stock No. 259-3849
  • Mfr. Part No. 1SDA071861R1
Each
£20,323.50(exc. VAT)
  • RS Stock No. 272-0328
  • Mfr. Part No. 8GK1082-3KK11
Each
£625.39(exc. VAT)
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