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.

50958 Products showing for Fuses & Circuit Breakers

139 of 999+
  • RS Stock No. 284-2373
Each
£77.88
  • RS Stock No. 823-4677
  • Mfr. Part No. 4 067 84
Each
£24.64
  • RS Stock No. 610-9787
Each (In a Pack of 10)
£0.474
  • RS Stock No. 125-1422
  • Mfr. Part No. 1492-SPM1B100
Each
£16.59
  • RS Stock No. 156-8715
  • Mfr. Part No. DD200M250
Each
£34.41
  • RS Stock No. 852-7051
  • Mfr. Part No. MDA-1-R
Each
£1.19
  • RS Stock No. 339-823
  • Mfr. Part No. SEA9BPN12
Each
£506.58
  • RS Stock No. 180-072
1 Pack of 10
£20.98
Better World
  • RS Stock No. 221-1258
  • Mfr. Part No. LV432570
Each
£34.72
  • RS Stock No. 360-7238
  • Mfr. Part No. 80000000005
Each (In a Pack of 5)
£1.902
  • RS Stock No. 774-0039
Each
£8.22
  • RS Stock No. 178-0993
  • Mfr. Part No. F1006577 / BNIT55V4
Each (In a Pack of 10)
£3.735
  • RS Stock No. 212-139
  • Mfr. Part No. R9F23113
Each
£7.04
Better World
  • RS Stock No. 219-9273
  • Mfr. Part No. A9F94202
Each
£142.37
  • RS Stock No. 647-8550
  • Mfr. Part No. MF-R160
Each (In a Pack of 10)
£0.269
  • RS Stock No. 181-8585
  • Mfr. Part No. C22M63
Each (In a Box of 10)
£4.276
  • RS Stock No. 454-8045
  • Mfr. Part No. 259076 NZMB1-A50
Each
£290.32
  • RS Stock No. 184-9064
  • Mfr. Part No. CPBBL
Each
£1.00
  • RS Stock No. 647-8673
  • Mfr. Part No. MF-RX110/72-0
Each (In a Pack of 10)
£0.233
  • RS Stock No. 289-1579
  • Mfr. Part No. 1SCA109094R1001
Each
£5.10
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