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.

51028 Products showing for Fuses & Circuit Breakers

616 of 999+
  • RS Stock No. 738-3138P
  • Mfr. Part No. 0KLK005.T
Each (Supplied on a Reel)
£15.95
Better World
  • RS Stock No. 160-712
  • Mfr. Part No. 3RV2321-4NC20
Each
£115.81
Better World
  • RS Stock No. 200-6175
  • Mfr. Part No. A9P34606
Each
£110.83
Better World
  • RS Stock No. 221-1150
  • Mfr. Part No. LV429228
Each
£70.35
Better World
  • RS Stock No. 210-1614
  • Mfr. Part No. 3VA1110-5EF46-0AA0
Each
£392.31
  • RS Stock No. 231-999
  • Mfr. Part No. 107620 NZMB2-AF70-BT-NA
Each
£516.16
  • RS Stock No. 257-519
  • Mfr. Part No. 3VA5580-0MH36-0AA0
Each
£2,825.75
  • RS Stock No. 155-956
  • Mfr. Part No. 3VA9277-0HC20
Each
£1,265.38
  • RS Stock No. 260-7912
  • Mfr. Part No. C25H3MA150
Each
£1,261.05
  • RS Stock No. 258-966
  • Mfr. Part No. 2NHG000B-400
1 Pack of 3
£10.48
  • RS Stock No. 654-795
  • Mfr. Part No. A9DH3606
Each
£228.13
  • RS Stock No. 428-690
  • Mfr. Part No. NHGL36125
Each
£1,589.24
  • RS Stock No. 276-1541
  • Mfr. Part No. A9R12463
Each
£281.11
  • RS Stock No. 209-7087
  • Mfr. Part No. 5ST3768-4
Each (In a Pack of 10)
£9.181
  • RS Stock No. 260-7531
  • Mfr. Part No. C11B3TM063L
Each
£327.80
  • RS Stock No. 117-069
  • Mfr. Part No. KV 9103
Each
£30.83
  • RS Stock No. 257-431
  • Mfr. Part No. 3VA5330-7EC31-1AA0
Each
£1,424.50
Better World
  • RS Stock No. 243-6246
  • Mfr. Part No. 5SU1646-7FP16
Each
£368.02
  • RS Stock No. 182-1805
  • Mfr. Part No. SD1-D-PV
Each
£42.20
Better World
  • RS Stock No. 214-2050
  • Mfr. Part No. M9D11606
Each
£203.58
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