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

199 of 999+
  • RS Stock No. 911-3499
Each (In a Pack of 10)
£0.388(exc. VAT)
  • RS Stock No. 767-5055
Each (In a Pack of 10)
£0.246(exc. VAT)
  • RS Stock No. 488-6836
  • Mfr. Part No. 2CDS251001R0104 - S201C10
Each
£16.45(exc. VAT)
  • RS Stock No. 182-1528
  • Mfr. Part No. 250NHG03B
1 Box of 3
£36.21(exc. VAT)
  • RS Stock No. 413-670
  • Mfr. Part No. 2312406
Each (In a Pack of 5)
£1.138(exc. VAT)
  • RS Stock No. 852-7269
  • Mfr. Part No. HTB-28M-R
Each
£1.78(exc. VAT)
  • RS Stock No. 336-639
  • Mfr. Part No. SEA9BPN4
Each
£361.50(exc. VAT)
  • RS Stock No. 282-2340
  • Mfr. Part No. FB25288Q1
Each (In a Pack of 8)
£7.64(exc. VAT)
  • RS Stock No. 232-0082
  • Mfr. Part No. 1SDA038320R1 UVD 220-250VAC/DC T7-X-E
Each
£520.84(exc. VAT)
Better World
  • RS Stock No. 772-1423
  • Mfr. Part No. 5SY4506-8
Each
£61.04(exc. VAT)
  • RS Stock No. 517-7076P
  • Mfr. Part No. SMD150F-2
Each (Supplied on a Reel)
£0.295(exc. VAT)
  • RS Stock No. 265-0183
Each
£19.99(exc. VAT)
  • RS Stock No. 519-867
  • Mfr. Part No. 1368127
Each
£1,031.55(exc. VAT)
  • RS Stock No. 769-4429
  • Mfr. Part No. 239024 FAZ6-B25/1
Each
£20.67(exc. VAT)
  • RS Stock No. 878-3318
  • Mfr. Part No. KLDR015
Each (In a Pack of 10)
£36.095(exc. VAT)
  • RS Stock No. 537-8639
  • Mfr. Part No. S500-315-R
Each (In a Pack of 10)
£0.359(exc. VAT)
  • RS Stock No. 261-964
  • Mfr. Part No. RS20H
1 Pack of 10
£146.14(exc. VAT)
Better World
  • RS Stock No. 209-7445
  • Mfr. Part No. 5SL4215-7
Each
£60.32(exc. VAT)
  • RS Stock No. 123-234
  • Mfr. Part No. 170333 FRCMM-40/4/003-A
Each
£112.86(exc. VAT)
  • RS Stock No. 922-7030
  • Mfr. Part No. 278576 FAZ-D4/1
Each
£27.25(exc. VAT)
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