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

681 of 999+
  • RS Stock No. 210-9405
  • Mfr. Part No. 3VA9483-0QC00
Each
£95.51
Better World
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  • Mfr. Part No. A9Y12440
Each
£359.98
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  • Mfr. Part No. 125NHG1B-690
Each
£11.24
  • RS Stock No. 260-7679
  • Mfr. Part No. C12E3TM125B
Each
£385.84
  • RS Stock No. 438-790
  • Mfr. Part No. M9L21240
Each
£593.13
  • RS Stock No. 248-941
  • Mfr. Part No. 187414 FRCMM-25/4/01-G/F
Each
£218.54
  • RS Stock No. 253-682
  • Mfr. Part No. 269208 NZMB2-A32-NA
Each
£445.58
Better World
  • RS Stock No. 236-7450
  • Mfr. Part No. 1SDA067712R1 XT2V 160 TMA 125A 3P+N FF
Each
£908.54
  • RS Stock No. 335-011
  • Mfr. Part No. KSA630DMBL43F
Each
£3,201.73
  • RS Stock No. 577-473
  • Mfr. Part No. 1658-G21-02-P10-12A
Each
£4.33
  • RS Stock No. 895-1669P
  • Mfr. Part No. 37205000431
Each (Supplied in a Bag)
£0.844
  • RS Stock No. 599-811
  • Mfr. Part No. NQN306
Each
£241.47
Better World
  • RS Stock No. 231-9966
  • Mfr. Part No. 2CSS200923R0001 SN201-IH
Each
£45.43
  • RS Stock No. 608-804
  • Mfr. Part No. 3NE3421-0C
1 Pack of 3
£419.29
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  • Mfr. Part No. 2081900000
Each
£23.69
  • RS Stock No. 200-965
  • Mfr. Part No. 2CDS383103R0277
Each
£199.32
  • RS Stock No. 184-9123
  • Mfr. Part No. DDS08188MS-P01
Each
£179.20
  • RS Stock No. 272-7586
  • Mfr. Part No. TA16D4L1604TPE
Each
£2,666.04
Better World
  • RS Stock No. 271-9729
  • Mfr. Part No. 3VA1112-5FD46-0AA0
Each
£478.35
  • RS Stock No. 144-4764
  • Mfr. Part No. NGN225
Each
£103.20
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