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.

51057 Products showing for Fuses & Circuit Breakers

578 of 999+
  • RS Stock No. 599-757
  • Mfr. Part No. CFC684F
Each
£731.55
Better World
  • RS Stock No. 178-8177
  • Mfr. Part No. LV426302
Each
£255.25
  • RS Stock No. 138-679
  • Mfr. Part No. NANOSMDC050F/13.2-2
Each (In a Pack of 10)
£0.33
  • RS Stock No. 203-9033
  • Mfr. Part No. 236745 PXF-25/2/01-A
Each
£103.42
  • RS Stock No. 498-142
  • Mfr. Part No. 1115663
Each
£56.33
  • RS Stock No. 247-518
  • Mfr. Part No. 168876 BB-EVP-10/3P-2MU
Each
£56.63
  • RS Stock No. 409-873
  • Mfr. Part No. 1610-21-8A
Each
£10.82
  • RS Stock No. 210-6976
  • Mfr. Part No. 3NE3340-8
Each (In a Pack of 3)
£296.567
Better World
  • RS Stock No. 210-1715
  • Mfr. Part No. 3VA2110-5KP46-0AA0
Each
£1,200.47
Better World
  • RS Stock No. 209-6927
  • Mfr. Part No. 3VA2140-5MN32-0AA0
Each
£379.00
  • RS Stock No. 284-5271
  • Mfr. Part No. 0034.6609
Each (In a Pack of 10)
£0.346
  • RS Stock No. 273-2275
  • Mfr. Part No. 140MT-C-AFAR10A01
Each
£14.65
  • RS Stock No. 299-745
  • Mfr. Part No. 5SJ4160-7HG40
Each
£103.36
  • RS Stock No. 236-7244
  • Mfr. Part No. 1SDA067308R1 Ekip LSI In=100A XT2 3p
Each
£815.74
  • RS Stock No. 731-9916
  • Mfr. Part No. 4 108 13
Each
£347.07
  • RS Stock No. 125-1449
  • Mfr. Part No. 1492-SPM3B400
Each
£71.10
  • RS Stock No. 255-2298
  • Mfr. Part No. 092921
1 Box of 10
£77.54
  • RS Stock No. 250-8639
  • Mfr. Part No. LF516M
Each (In a Pack of 10)
£6.768
  • RS Stock No. 847-3667
  • Mfr. Part No. 278778 FAZ-D8/2
Each
£66.72
  • RS Stock No. 241-397
  • Mfr. Part No. 132415 FAZ-B1,5/1-NA
Each
£27.30
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