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.

50957 Products showing for Fuses & Circuit Breakers

116 of 999+
  • RS Stock No. 188-7448
  • Mfr. Part No. J213609
Each (In a Pack of 10)
£4.214
  • RS Stock No. 914-4348
  • Mfr. Part No. ATM2
Each
£12.20
  • RS Stock No. 405-9113
  • Mfr. Part No. 2-5700-IG1-P10-DD-000040-1A
Each
£23.00
  • RS Stock No. 769-3719
  • Mfr. Part No. 0451001.NRL
Each (In a Pack of 10)
£0.931
Better World
  • RS Stock No. 219-8902
  • Mfr. Part No. KNB50SN4
Each
£247.62
  • RS Stock No. 247-2701
  • Mfr. Part No. B222204
1 Box of 10
£18.37
  • RS Stock No. 167-8109
  • Mfr. Part No. 0034.3123
Each (In a Pack of 10)
£0.377
  • RS Stock No. 409-766
  • Mfr. Part No. 1410-L210-L2F1-S02-1A
Each
£9.16
  • RS Stock No. 490-440
  • Mfr. Part No. 236778 PXF-40/4/03-A
Each
£76.28
  • RS Stock No. 922-8642
  • Mfr. Part No. 235424 PFIM-25/2/003-A-MW
Each
£133.40
  • RS Stock No. 252-766
  • Mfr. Part No. 193525 FRBmM-C32/1N/01-F
Each
£180.36
  • RS Stock No. 431-6810
  • Mfr. Part No. 153.5395.6171
Each (In a Pack of 5)
£8.968
  • RS Stock No. 182-1597
  • Mfr. Part No. 170M1568D
Each
£62.79
  • RS Stock No. 209-9399
Each (In a Pack of 10)
£2.627
  • RS Stock No. 779-9962
  • Mfr. Part No. OFAF000H50 1SCA022627R1210
Each
£5.07
Better World
  • RS Stock No. 776-2821
  • Mfr. Part No. A9XPE110
Each
£5.92
  • RS Stock No. 229-101
  • Mfr. Part No. C10G20 CYLINDRICAL FUSE 10 x 38 20A GG 500V AC
1 Pack of 10
£6.85
  • RS Stock No. 537-1278
  • Mfr. Part No. S500-200-R
Each (In a Pack of 10)
£0.664
  • RS Stock No. 265-0161
Each
£18.95
  • RS Stock No. 377-0308
  • Mfr. Part No. D215191
Each (In a Pack of 5)
£2.16
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