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.

50958 Products showing for Fuses & Circuit Breakers

123 of 999+
  • RS Stock No. 922-8642
  • Mfr. Part No. 235424 PFIM-25/2/003-A-MW
Each
£133.40
Better World
  • RS Stock No. 746-7854
  • Mfr. Part No. 2CDS252001R0061 S202-D6
Each
£47.25
  • RS Stock No. 230-0960
  • Mfr. Part No. 177468 FAZ6-C15/3N
Each
£43.74
  • RS Stock No. 541-3338
  • Mfr. Part No. 0451.250MRL
Each (In a Pack of 10)
£1.581
  • RS Stock No. 189-5649
  • Mfr. Part No. 1SPE007717F1700 F712403
Each
£12.93
  • RS Stock No. 865-7764
  • Mfr. Part No. 0034.3882
Each (In a Pack of 10)
£0.756
  • RS Stock No. 849-6468
  • Mfr. Part No. EUC1P10B
Each
£7.91
  • RS Stock No. 866-3227
  • Mfr. Part No. 0001.2505
Each (In a Pack of 50)
£0.465
  • RS Stock No. 848-4188
  • Mfr. Part No. LP-CC-15
Each
£48.65
Better World
  • RS Stock No. 791-3035
  • Mfr. Part No. A9A27008
Each
£46.24
  • RS Stock No. 237-6640
  • Mfr. Part No. 2CTB803972R1200
Each
£153.76
Better World
  • RS Stock No. 256-6751
  • Mfr. Part No. M9F21201
Each
£91.29
  • RS Stock No. 237-6057
  • Mfr. Part No. 1SDA066392R1 UVR XT1..4 220-240VAC/DC
Each
£126.07
  • RS Stock No. 361-8159
  • Mfr. Part No. 171530.0,5
Each (In a Pack of 10)
£1.394
  • RS Stock No. 189-5330
  • Mfr. Part No. H1062676 / CMC83N
Each
£28.06
  • RS Stock No. 765-2954
  • Mfr. Part No. SD2-D
Each
£32.16
  • RS Stock No. 259-106
  • Mfr. Part No. 291468 EVG-16/2PHAS/6MODUL
Each
£6.37
Better World
  • RS Stock No. 202-7133
  • Mfr. Part No. 5SY4101-5
Each
£29.36
  • RS Stock No. 517-6584
  • Mfr. Part No. RXEF020
Each (In a Pack of 10)
£0.335
  • RS Stock No. 849-5649
  • Mfr. Part No. BK-GMD-1-5-R
Each
£1.01
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