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.

50907 Products showing for Fuses & Circuit Breakers

572 of 999+
Better World
  • RS Stock No. 157-079
  • Mfr. Part No. 3VA2110-5JQ46-0AA0
Each
£1,298.66(exc. VAT)
Better World
  • RS Stock No. 211-0427
  • Mfr. Part No. KNB25SD4
Each
£195.74(exc. VAT)
  • RS Stock No. 246-2536
  • Mfr. Part No. 2CCS571103R8324
Each
£71.92(exc. VAT)
  • RS Stock No. 183-3704
  • Mfr. Part No. 2CSR245041R1324
Each
£111.24(exc. VAT)
  • RS Stock No. 216-6015
  • Mfr. Part No. 5ST3044
Each
£76.61(exc. VAT)
  • RS Stock No. 247-506
  • Mfr. Part No. 168836 BB-EVF-10/N-2MU
Each
£30.70(exc. VAT)
  • RS Stock No. 755-2961
  • Mfr. Part No. 3RV2917-5AA00
Each
£3.88(exc. VAT)
  • RS Stock No. 712-4752P
  • Mfr. Part No. 0090.0003
Each (Supplied in a Box)
£17.33(exc. VAT)
Better World
  • RS Stock No. 209-6864
  • Mfr. Part No. 3VA1180-5GF46-0AA0
Each
£343.19(exc. VAT)
  • RS Stock No. 667-0330
1 Box of 10
£70.29(exc. VAT)
  • RS Stock No. 304-2243
  • Mfr. Part No. B300082
Each
£232.27(exc. VAT)
  • RS Stock No. 484-009
  • Mfr. Part No. 1117754
Each
£270.08(exc. VAT)
  • RS Stock No. 203-2375
  • Mfr. Part No. 5TE4800
Each
£42.68(exc. VAT)
  • RS Stock No. 182-4048
Each
£6.84(exc. VAT)
  • RS Stock No. 136-0581
  • Mfr. Part No. F1017203 / FR14GR69V20
Each
£11.54(exc. VAT)
  • RS Stock No. 270-3043
  • Mfr. Part No. G228442
Each
£14.21(exc. VAT)
Better World
  • RS Stock No. 211-9612
  • Mfr. Part No. 5SU1354-4KK25
Each
£157.28(exc. VAT)
  • RS Stock No. 182-3991
Each (In a Pack of 5)
£2.148(exc. VAT)
  • RS Stock No. 275-8816
  • Mfr. Part No. R9EXV
Each
£8.12(exc. VAT)
  • RS Stock No. 787-4233P
  • Mfr. Part No. 01550320ZXU
Each (Supplied in a Bag)
£3.08(exc. VAT)
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