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

527 of 999+
  • RS Stock No. 277-0920
  • Mfr. Part No. 3WA9111-0EK11
1 Set
£102.97(exc. VAT)
  • RS Stock No. 787-4384P
  • Mfr. Part No. 178.7017.0001
Each (Supplied in a Bag)
£11.69(exc. VAT)
Better World
  • RS Stock No. 209-5140
  • Mfr. Part No. 3VA2116-6JQ32-0AA0
Each
£1,309.23(exc. VAT)
  • RS Stock No. 230-3547
  • Mfr. Part No. H222210
Each (In a Pack of 10)
£2.273(exc. VAT)
  • RS Stock No. 210-6906
  • Mfr. Part No. 3NA6803-6
Each (In a Pack of 3)
£35.94(exc. VAT)
  • RS Stock No. 783-3204
  • Mfr. Part No. 70-007-33/0.16A
Each (In a Pack of 10)
£0.478(exc. VAT)
  • RS Stock No. 136-8606
  • Mfr. Part No. 1492-RCDA4B40S
Each
£213.18(exc. VAT)
Better World
  • RS Stock No. 271-9736
  • Mfr. Part No. 3VA1112-5GE46-0AA0
Each
£522.01(exc. VAT)
  • RS Stock No. 246-2505
  • Mfr. Part No. 2CCS571001R1064
Each
£58.69(exc. VAT)
  • RS Stock No. 251-2079
  • Mfr. Part No. NGN350
Each
£271.10(exc. VAT)
Better World
  • RS Stock No. 156-678
  • Mfr. Part No. 3VA2325-0MN32-0AA0
Each
£1,612.53(exc. VAT)
Better World
  • RS Stock No. 282-6231
  • Mfr. Part No. PV-250A-2XL-3BU-15
Each
£364.20(exc. VAT)
  • RS Stock No. 266-1299
  • Mfr. Part No. 406288
Each
£335.99(exc. VAT)
  • RS Stock No. 140-854
  • Mfr. Part No. 2CCS861001R0084
Each
£64.01(exc. VAT)
  • RS Stock No. 144-4875
  • Mfr. Part No. BFC863
Each
£305.35(exc. VAT)
  • RS Stock No. 173-9792
  • Mfr. Part No. 0034.6602
Each (In a Box of 100)
£0.607(exc. VAT)
Better World
  • RS Stock No. 282-6229
  • Mfr. Part No. PV-200A-2XL-U-15
Each
£403.59(exc. VAT)
Better World
  • RS Stock No. 282-6228
  • Mfr. Part No. PV-200A-2XL-3BU-15
Each
£364.20(exc. VAT)
  • RS Stock No. 184-9022
  • Mfr. Part No. CPB10
Each
£3.28(exc. VAT)
  • RS Stock No. 203-043
  • Mfr. Part No. 2CDS381103R0161
Each
£62.68(exc. VAT)
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