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

476 of 999+
  • RS Stock No. 354-491
  • Mfr. Part No. A9L65122
Each
£86.66(exc. VAT)
  • RS Stock No. 229-003
  • Mfr. Part No. C22M63S CYL FUSE >STR >22 x 58 63A AM 690V AC
1 Pack of 10
£90.74(exc. VAT)
Better World
  • RS Stock No. 256-6761
  • Mfr. Part No. M9F22245
Each
£92.68(exc. VAT)
Better World
  • RS Stock No. 874-4540
  • Mfr. Part No. 3VA9988-0BL33
Each
£61.73(exc. VAT)
  • RS Stock No. 136-8603
  • Mfr. Part No. 1492-RCDA4B25
Each
£130.37(exc. VAT)
  • RS Stock No. 565-370
  • Mfr. Part No. 24112000021
Each
£9.32(exc. VAT)
  • RS Stock No. 537-821
  • Mfr. Part No. R9J02063
1 Pack of 10
£101.55(exc. VAT)
  • RS Stock No. 738-3113P
  • Mfr. Part No. 0242.100UAT1
Each (Supplied as a Tape)
£0.94(exc. VAT)
  • RS Stock No. 189-5341
  • Mfr. Part No. H1062722 / CUS10N
Each
£9.82(exc. VAT)
Better World
  • RS Stock No. 260-155
  • Mfr. Part No. 3VA6225-8JT31-0AA0
Each
£1,939.75(exc. VAT)
  • RS Stock No. 225-5932
  • Mfr. Part No. 2CCF019614R0001 S803PV-SP25 - 5 kA
Each
£273.86(exc. VAT)
  • RS Stock No. 248-5657
  • Mfr. Part No. SA03PA320R
Each
£249.15(exc. VAT)
Better World
  • RS Stock No. 248-3832
  • Mfr. Part No. LV848500
Each
£2,944.63(exc. VAT)
  • RS Stock No. 237-6596
  • Mfr. Part No. 2CPX061359R9999
1 Box of 1
£1,266.28(exc. VAT)
  • RS Stock No. 191-4597
  • Mfr. Part No. SF-2410FP0315T-2
Each (On a Tape of 10)
£0.992(exc. VAT)
  • RS Stock No. 228-875
  • Mfr. Part No. CM63F
1 Pack of 10
£248.55(exc. VAT)
  • RS Stock No. 188-7369
  • Mfr. Part No. P218720
Each (In a Pack of 10)
£2.316(exc. VAT)
  • RS Stock No. 285-7761
  • Mfr. Part No. 4301.1409
Each
£3.43(exc. VAT)
  • RS Stock No. 121-910
  • Mfr. Part No. 153383 NZMB2-4-AF90-BT-NA
Each
£929.39(exc. VAT)
  • RS Stock No. 541-4230A
  • Mfr. Part No. 0218.500MXP
Each (In a Pack of 100)
£0.231(exc. VAT)
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