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.

50973 Products showing for Fuses & Circuit Breakers

672 of 999+
Better World
  • RS Stock No. 219-8883
  • Mfr. Part No. KBC16ZB1
Each (In a Pack of 10)
£3.286
  • RS Stock No. 230-626
  • Mfr. Part No. 116661 BPM-O-600/12-P
Each
£948.98
  • RS Stock No. 616-9969
  • Mfr. Part No. Q82 A 125 05 100
Each
£5.92
  • RS Stock No. 358-392
  • Mfr. Part No. KHB0250SE5
Each
£9,715.16
  • RS Stock No. 253-7601
  • Mfr. Part No. 2908361
Each (In a Pack of 2)
£6.715
  • RS Stock No. 922-7181
  • Mfr. Part No. 279128 FAZ-C16/1-DC
Each
£71.11
  • RS Stock No. 300-018
  • Mfr. Part No. 5SJ4130-6HG40
Each
£38.19
  • RS Stock No. 219-9315
  • Mfr. Part No. GB2CD20
Each (In a Pack of 6)
£47.672
  • RS Stock No. 401-711
  • Mfr. Part No. PISA11.403
Each
£53.07
  • RS Stock No. 230-0997
  • Mfr. Part No. 177520 FAZ6-D1,6/1N
Each
£62.97
  • RS Stock No. 230-1308
  • Mfr. Part No. 102267 FAZ-D10/3-NA
Each
£140.65
  • RS Stock No. 655-033
  • Mfr. Part No. LV833662SP
Each
£286.57
  • RS Stock No. 254-4120
  • Mfr. Part No. PF-FB1-225
Each
£143.87
  • RS Stock No. 192-0871
  • Mfr. Part No. 1SDA066279R1
Each
£70.49
Better World
  • RS Stock No. 211-0456
  • Mfr. Part No. KSA250DTC40
Each
£689.02
  • RS Stock No. 177-5051
  • Mfr. Part No. 2CSF202401R1250 F202 A-25/0,03 AP-R
Each
£179.53
  • RS Stock No. 339-649
  • Mfr. Part No. SED63102
Each
£147.88
  • RS Stock No. 144-4847
  • Mfr. Part No. BDC425F
Each
£267.05
  • RS Stock No. 226-2958
  • Mfr. Part No. 8WA1822-7EF25
Each (In a Pack of 10)
£1.413
Better World
  • RS Stock No. 211-0411
  • Mfr. Part No. KNA160ABT4
Each
£1,177.23
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