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

507 of 999+
  • RS Stock No. 541-3338
  • Mfr. Part No. 0451.250MRL
Each (In a Pack of 10)
£1.581(exc. VAT)
  • RS Stock No. 230-280
  • Mfr. Part No. 109704 NZMH3-4-A500
Each
£3,168.37(exc. VAT)
  • RS Stock No. 395-822
  • Mfr. Part No. 3NE3233
Each (In a Pack of 3)
£199.193(exc. VAT)
  • RS Stock No. 767-4409
  • Mfr. Part No. 2CSR273001R1105 DS203 M AC-B10/0,03
Each
£254.82(exc. VAT)
  • RS Stock No. 236-7372
  • Mfr. Part No. 1SDA067584R1 XT2H 160 TMD 1.6A FF
Each
£299.72(exc. VAT)
Better World
  • RS Stock No. 254-6297
  • Mfr. Part No. C10N3TM032
Each
£300.82(exc. VAT)
  • RS Stock No. 395-648
  • Mfr. Part No. 3NG1202
Each
£35.34(exc. VAT)
  • RS Stock No. 435-217
  • Mfr. Part No. 2CCG001217R0001
Each
£198.11(exc. VAT)
  • RS Stock No. 260-9389
  • Mfr. Part No. C104TM063
Each
£167.39(exc. VAT)
  • RS Stock No. 218-1811
  • Mfr. Part No. 3VA9211-0WD40
Each
£21.83(exc. VAT)
  • RS Stock No. 272-7580
  • Mfr. Part No. TA10D3L0634TPE
Each
£1,542.30(exc. VAT)
  • RS Stock No. 563-368
Each (In a Pack of 10)
£0.253(exc. VAT)
  • RS Stock No. 218-1822
  • Mfr. Part No. 3VA9221-0WG40
Each
£36.99(exc. VAT)
  • RS Stock No. 611-252
  • Mfr. Part No. PLSM-B13-MW
Each
£16.27(exc. VAT)
Better World
  • RS Stock No. 238-3287
  • Mfr. Part No. A9DK1720
Each
£352.82(exc. VAT)
  • RS Stock No. 312-3673
  • Mfr. Part No. GB2CB10
Each
£28.91(exc. VAT)
  • RS Stock No. 125-1419
  • Mfr. Part No. 1492-SPM1B030
Each
£19.92(exc. VAT)
Better World
  • RS Stock No. 521-4945
  • Mfr. Part No. 5SY6103-7
Each
£19.01(exc. VAT)
  • RS Stock No. 769-0168
  • Mfr. Part No. 52000001009
Each (In a Pack of 50)
£0.142(exc. VAT)
  • RS Stock No. 759-4795P
  • Mfr. Part No. ERBRE5R00V
Each (Supplied on a Reel)
£0.163(exc. VAT)
Results per page