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

348 of 999+
  • RS Stock No. 667-0624
  • Mfr. Part No. 235410 PFIM-40/4/003-MW
Each
£155.33(exc. VAT)
  • RS Stock No. 270-2608
  • Mfr. Part No. 3061321
Each (In a Pack of 10)
£8.455(exc. VAT)
  • RS Stock No. 493-513
  • Mfr. Part No. 1471917
Each
£39.94(exc. VAT)
  • RS Stock No. 188-4479
1 Box of 2000
£4,961.02(exc. VAT)
  • RS Stock No. 630-810
  • Mfr. Part No. G095548Q
1 Box of 10
£9.60(exc. VAT)
  • RS Stock No. 213-2563
  • Mfr. Part No. 5ST3644
Each (In a Pack of 10)
£12.575(exc. VAT)
Better World
  • RS Stock No. 219-8292
  • Mfr. Part No. A9N18448
Each
£94.79(exc. VAT)
  • RS Stock No. 654-982
  • Mfr. Part No. C11F6TM063L
Each
£461.80(exc. VAT)
  • RS Stock No. 237-5103
  • Mfr. Part No. 2CSR254001R1325
Each
£317.21(exc. VAT)
  • RS Stock No. 178-1082
  • Mfr. Part No. M226331 / BTTM42V630
Each
£123.90(exc. VAT)
  • RS Stock No. 181-8508
  • Mfr. Part No. 15ET
Each (In a Box of 10)
£26.952(exc. VAT)
  • RS Stock No. 245-9204
  • Mfr. Part No. SF-0603SPA300R-2
Each
£0.89(exc. VAT)
Better World
  • RS Stock No. 790-8819
  • Mfr. Part No. A9F43304
Each
£112.94(exc. VAT)
  • RS Stock No. 147-725
  • Mfr. Part No. 3VA5190-5EC31-1AA0
Each
£272.02(exc. VAT)
  • RS Stock No. 769-3230
  • Mfr. Part No. SR-5-5A-BK
Each (In a Pack of 10)
£0.859(exc. VAT)
  • RS Stock No. 279-6757
Each (In a Pack of 10)
£0.718(exc. VAT)
Better World
  • RS Stock No. 219-9057
  • Mfr. Part No. DF2CN25
Each (In a Pack of 10)
£8.504(exc. VAT)
  • RS Stock No. 515-1052
  • Mfr. Part No. OSZ4 1SCA022530R0200
Each
£6.73(exc. VAT)
  • RS Stock No. 229-022
  • Mfr. Part No. CM100F
1 Pack of 5
£197.34(exc. VAT)
  • RS Stock No. 536-006
  • Mfr. Part No. 2882925
Each
£127.79(exc. VAT)
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