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.

51015 Products showing for Fuses & Circuit Breakers

30 of 999+
  • RS Stock No. 397-351
  • Mfr. Part No. 3NA3812
Each (In a Pack of 3)
£6.093(exc. VAT)
  • RS Stock No. 177-8117
Each (In a Pack of 20)
£0.528(exc. VAT)
  • RS Stock No. 537-1155
  • Mfr. Part No. S500-3.15-R
1 Pack of 10
£1.85(exc. VAT)
  • RS Stock No. 537-1638
  • Mfr. Part No. S506-250-R
Each (In a Pack of 10)
£0.427(exc. VAT)
  • RS Stock No. 489-4506
  • Mfr. Part No. C10M20
Each (In a Pack of 10)
£1.287(exc. VAT)
  • RS Stock No. 245-088
  • Mfr. Part No. A9D56806
Each
£157.12(exc. VAT)
  • RS Stock No. 537-1408
Each (In a Pack of 10)
£0.179(exc. VAT)
  • RS Stock No. 250-4741
  • Mfr. Part No. 2CDL220001R1012
Each
£8.83(exc. VAT)
  • RS Stock No. 878-1299
  • Mfr. Part No. 0298400.ZXH
Each
£7.90(exc. VAT)
  • RS Stock No. 521-2618
Each (In a Pack of 5)
£5.038(exc. VAT)
  • RS Stock No. 247-2878
  • Mfr. Part No. R218193
1 Box of 10
£12.53(exc. VAT)
  • RS Stock No. 922-8752
  • Mfr. Part No. 236305 PKNM-32/1N/C/003-MW
Each
£133.30(exc. VAT)
  • RS Stock No. 847-3557
  • Mfr. Part No. 278897 FAZ-D20/3
Each
£99.98(exc. VAT)
  • RS Stock No. 537-1442
  • Mfr. Part No. S501-1-R
Each (In a Pack of 10)
£0.199(exc. VAT)
  • RS Stock No. 413-276
  • Mfr. Part No. NITD4
Each (In a Pack of 5)
£2.702(exc. VAT)
Better World
  • RS Stock No. 151-1215
  • Mfr. Part No. 5SU1356-7KK13
Each
£123.56(exc. VAT)
Better World
  • RS Stock No. 521-4917
  • Mfr. Part No. 5SY6101-7
Each
£19.01(exc. VAT)
  • RS Stock No. 563-346
Each (In a Pack of 10)
£0.253(exc. VAT)
  • RS Stock No. 415-159
  • Mfr. Part No. TIA20
1 Pack of 5
£46.66(exc. VAT)
  • RS Stock No. 200-713
  • Mfr. Part No. 2CDS274337R0634
Each
£322.17(exc. VAT)
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