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.

50915 Products showing for Fuses & Circuit Breakers

423 of 999+
Better World
  • RS Stock No. 238-3266
  • Mfr. Part No. A9DA7716
Each
£368.68(exc. VAT)
  • RS Stock No. 769-0035
  • Mfr. Part No. 021906.3MXABP
Each (In a Pack of 10)
£0.952(exc. VAT)
  • RS Stock No. 250-4142
  • Mfr. Part No. 1SDA054413R1
Each
£2,469.62(exc. VAT)
  • RS Stock No. 124-2506
  • Mfr. Part No. 7TCA083670R0603 LK207-10
Each
£306.21(exc. VAT)
  • RS Stock No. 769-3416
  • Mfr. Part No. SS-5H-1-6A-BK
Each (In a Pack of 10)
£0.285(exc. VAT)
  • RS Stock No. 191-4563
  • Mfr. Part No. SF-2410HI150T-2
Each (On a Tape of 10)
£0.698(exc. VAT)
  • RS Stock No. 245-9237
  • Mfr. Part No. SF-1206SA075M-2
Each (On a Reel of 3000)
£0.394(exc. VAT)
  • RS Stock No. 738-3138
  • Mfr. Part No. 0KLK005.T
Each
£15.95(exc. VAT)
  • RS Stock No. 488-6937
  • Mfr. Part No. 2CDS251001R0405 - S201B40
Each
£16.38(exc. VAT)
  • RS Stock No. 144-4885
  • Mfr. Part No. BP264
Each
£346.78(exc. VAT)
  • RS Stock No. 174-0349
  • Mfr. Part No. 0805L020YR
1 Reel of 4000
£3,162.97(exc. VAT)
  • RS Stock No. 213-2576
  • Mfr. Part No. 5ST3710-0HG
Each
£122.84(exc. VAT)
  • RS Stock No. 428-693
  • Mfr. Part No. NHJL36015
Each
£1,413.18(exc. VAT)
  • RS Stock No. 266-8369
  • Mfr. Part No. XCAP-FUSE
Each
£27.77(exc. VAT)
Better World
  • RS Stock No. 238-3474
  • Mfr. Part No. A9R77725
Each
£340.35(exc. VAT)
  • RS Stock No. 358-262
  • Mfr. Part No. KSB400DC5TRE
Each
£3,212.23(exc. VAT)
  • RS Stock No. 204-7398
  • Mfr. Part No. Q82 A 60 05 100
Each
£4.97(exc. VAT)
  • RS Stock No. 429-216
  • Mfr. Part No. A9N18547
Each
£1,121.56(exc. VAT)
  • RS Stock No. 260-7764
  • Mfr. Part No. C16F44V160
Each
£2,410.04(exc. VAT)
  • RS Stock No. 183-3553
  • Mfr. Part No. 179531 FRCDM-40/4/003-G/BFQ
Each
£750.92(exc. VAT)
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