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

723 of 999+
  • RS Stock No. 153-370
  • Mfr. Part No. 3VA9483-0JC23
Each
£163.48
  • RS Stock No. 231-401
  • Mfr. Part No. 113532 NZMN3-4-A320-AVE
Each
£2,841.84
  • RS Stock No. 152-510
  • Mfr. Part No. 5ST3725-3
Each
£27.63
  • RS Stock No. 611-254
  • Mfr. Part No. PLSM-B13/3-MW
Each
£47.28
  • RS Stock No. 565-503
  • Mfr. Part No. 0242.040UR
Each
£1,106.88
  • RS Stock No. 182-1409
  • Mfr. Part No. 170M3810D
Each (In a Box of 6)
£56.588
Better World
  • RS Stock No. 219-9149
  • Mfr. Part No. M9F42104
Each
£107.78
  • RS Stock No. 287-6355
  • Mfr. Part No. 2CDS251103R0105
Each (In a Pack of 5)
£67.872
  • RS Stock No. 232-0200
  • Mfr. Part No. 1SDA066661R1 LTC XT3 2PCS
Each
£25.51
Better World
  • RS Stock No. 746-7573
  • Mfr. Part No. 2CDS252001R0255 S202-B25
Each
£42.45
  • RS Stock No. 247-1769
  • Mfr. Part No. 33264
Each
£2,940.17
Better World
  • RS Stock No. 209-6958
  • Mfr. Part No. 3VA1050-3ED32-0AA0
Each
£153.86
  • RS Stock No. 271-3207
  • Mfr. Part No. 8WA1822-7EF16
Each (In a Pack of 10)
£1.413
  • RS Stock No. 825-5504
  • Mfr. Part No. P1MB1NC02
Each
£61.58
  • RS Stock No. 225-5925
  • Mfr. Part No. 2CCF019605R0001 S802PV-SP63 - 5 kA
Each
£206.07
Better World
  • RS Stock No. 271-9719
  • Mfr. Part No. 3VA1112-4FF46-0AA0
Each
£547.12
  • RS Stock No. 136-0585
  • Mfr. Part No. Y216543C / NH000GG50V80/3
Each
£3.55
  • RS Stock No. 231-9760
  • Mfr. Part No. 2CDS273337R0427 SU203M-K10
1 Box of 1
£149.13
  • RS Stock No. 270-3017
  • Mfr. Part No. C227863
Each
£9.31
  • RS Stock No. 260-712
  • Mfr. Part No. TTM560
Each
£223.64
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