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

495 of 999+
  • RS Stock No. 236-7319
  • Mfr. Part No. 1SDA067498R1 Ekip LS/I In=40A XT4 3p
Each
£279.92(exc. VAT)
  • RS Stock No. 577-473
  • Mfr. Part No. 1658-G21-02-P10-12A
Each
£4.33(exc. VAT)
Better World
  • RS Stock No. 219-9309
  • Mfr. Part No. A9F95402
Each
£373.15(exc. VAT)
Better World
  • RS Stock No. 224-7804
  • Mfr. Part No. 3VA1112-5ED36-0AA0
Each
£589.29(exc. VAT)
  • RS Stock No. 254-568
  • Mfr. Part No. 266714 NZM4-4-XAVS
Each
£2,268.71(exc. VAT)
Better World
  • RS Stock No. 271-9319
  • Mfr. Part No. 3VA1140-3GF46-0AA0
Each
£267.03(exc. VAT)
  • RS Stock No. 922-6901
  • Mfr. Part No. 102088 FAZ-C13/1-NA
Each
£31.19(exc. VAT)
  • RS Stock No. 178-1026
  • Mfr. Part No. N1045270 / BTIS42V40
Each (In a Pack of 10)
£10.718(exc. VAT)
  • RS Stock No. 602-228
  • Mfr. Part No. ADF816F
Each
£282.57(exc. VAT)
  • RS Stock No. 339-687
  • Mfr. Part No. C160S3FM
Each
£2,982.67(exc. VAT)
  • RS Stock No. 246-2567
  • Mfr. Part No. 2CCS572001R0134
Each
£57.20(exc. VAT)
  • RS Stock No. 667-0330
1 Box of 10
£70.29(exc. VAT)
  • RS Stock No. 277-0970
  • Mfr. Part No. 3WA9111-0EX50
Each
£648.44(exc. VAT)
  • RS Stock No. 232-0204
  • Mfr. Part No. 1SDA066665R1 HTC XT1 2PCS
Each
£23.67(exc. VAT)
  • RS Stock No. 232-0232
  • Mfr. Part No. 1SDA066898R1 ES XT3 4PCS
Each
£50.70(exc. VAT)
Better World
  • RS Stock No. 124-3206
  • Mfr. Part No. 5SY4440-8
Each
£138.55(exc. VAT)
  • RS Stock No. 211-967
  • Mfr. Part No. A9Z32440
Each
£181.07(exc. VAT)
  • RS Stock No. 250-751
  • Mfr. Part No. 193679 EPTP850-BP400
Each
£26.36(exc. VAT)
Better World
  • RS Stock No. 212-0187
  • Mfr. Part No. GV4LUG
Each
£2.98(exc. VAT)
  • RS Stock No. 654-744
  • Mfr. Part No. A9TDFD616
Each
£429.96(exc. VAT)
Results per page