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.

50914 Products showing for Fuses & Circuit Breakers

330 of 999+
  • RS Stock No. 254-6274
  • Mfr. Part No. C103TM100D
Each
£186.10(exc. VAT)
  • RS Stock No. 787-4215P
  • Mfr. Part No. 0603L010YR
Each (Supplied on a Reel)
£0.968(exc. VAT)
Better World
  • RS Stock No. 216-4774
  • Mfr. Part No. 5SL6302-7
Each
£77.12(exc. VAT)
Better World
  • RS Stock No. 178-8158
  • Mfr. Part No. LV426263
Each
£297.64(exc. VAT)
  • RS Stock No. 335-406
  • Mfr. Part No. SED25032
Each
£152.45(exc. VAT)
  • RS Stock No. 339-352
  • Mfr. Part No. SEA9BN8E
Each
£397.00(exc. VAT)
  • RS Stock No. 228-742
  • Mfr. Part No. 35NZ02 FUSE-D02 35A T GL/GG 400VAC E18
1 Pack of 10
£12.95(exc. VAT)
  • RS Stock No. 250-8628
  • Mfr. Part No. LF425G
Each (In a Pack of 10)
£4.183(exc. VAT)
  • RS Stock No. 169-9438
  • Mfr. Part No. S501-800-R
1 Bag of 1000
£476.09(exc. VAT)
Better World
  • RS Stock No. 225-8801
  • Mfr. Part No. 5SU1656-7KK16
Each
£123.56(exc. VAT)
  • RS Stock No. 123-714
  • Mfr. Part No. 170997 FRBM6-C10/3N/003-A
Each
£182.97(exc. VAT)
  • RS Stock No. 188-6568
  • Mfr. Part No. H084003
Each (In a Pack of 10)
£3.073(exc. VAT)
  • RS Stock No. 231-9943
  • Mfr. Part No. 2CSR255151R1504 DSE201 C50 A30
Each
£82.22(exc. VAT)
Better World
  • RS Stock No. 219-9131
  • Mfr. Part No. M9F22310
Each
£118.40(exc. VAT)
  • RS Stock No. 246-2487
  • Mfr. Part No. 2CCS571001R0377
Each
£33.77(exc. VAT)
Better World
  • RS Stock No. 211-0500
  • Mfr. Part No. KSB250DC4TRE
Each
£1,130.57(exc. VAT)
  • RS Stock No. 144-4756
  • Mfr. Part No. NGN201
Each
£123.45(exc. VAT)
  • RS Stock No. 270-3029
  • Mfr. Part No. E095569
Each (In a Box of 10)
£0.723(exc. VAT)
  • RS Stock No. 275-0443
  • Mfr. Part No. PR21-4-20.0A-XX-V
Each
£39.36(exc. VAT)
  • RS Stock No. 769-3292
  • Mfr. Part No. SR-5H-1-25A-BK
Each (In a Pack of 5)
£0.69(exc. VAT)
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