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.

50957 Products showing for Fuses & Circuit Breakers

708 of 999+
  • RS Stock No. 251-2063
  • Mfr. Part No. KN10N
Each
£10.97
Better World
  • RS Stock No. 219-8904
  • Mfr. Part No. KNT100ED4306
Each
£498.10
  • RS Stock No. 144-4540
  • Mfr. Part No. LS612
Each
£52.12
  • RS Stock No. 266-1349
  • Mfr. Part No. 410151
Each
£329.05
  • RS Stock No. 229-001
  • Mfr. Part No. C22M32S CYL FUSE STR 22x58mm 32A GG 690V AC
1 Pack of 10
£85.88
  • RS Stock No. 458-792
  • Mfr. Part No. A9F90204
Each
£143.66
  • RS Stock No. 254-464
  • Mfr. Part No. 259854 NZM3-XR24-30DC
Each
£1,224.49
  • RS Stock No. 346-778
  • Mfr. Part No. NHDF36150TW
Each
£735.95
  • RS Stock No. 131-616
  • Mfr. Part No. 404460
1 Pack of 1
£1.33
  • RS Stock No. 600-7350
  • Mfr. Part No. 3410.0035.01
Each (In a Pack of 20)
£2.484
  • RS Stock No. 269-699
  • Mfr. Part No. 3VA5240-6ED31-2AA0
Each
£609.23
  • RS Stock No. 299-688
  • Mfr. Part No. 3NE5327-0MK06
Each
£213.71
  • RS Stock No. 600-7366
  • Mfr. Part No. 3410.0037.01
Each (In a Pack of 20)
£2.524
  • RS Stock No. 517-7026
  • Mfr. Part No. SMD030F-2
Each (In a Pack of 10)
£0.405
  • RS Stock No. 218-8820
  • Mfr. Part No. 1492-SPM3B070
Each
£54.80
Better World
  • RS Stock No. 238-3460
  • Mfr. Part No. A9R56240
Each
£126.16
  • RS Stock No. 259-3612
  • Mfr. Part No. 1SDA071588R1
Each
£8,355.59
Better World
  • RS Stock No. 211-0456
  • Mfr. Part No. KSA250DTC40
Each
£689.02
  • RS Stock No. 820-7101
  • Mfr. Part No. 0438.750WR
Each (In a Pack of 100)
£0.617
  • RS Stock No. 177-8054
1 Bag of 1000
£139.70
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