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.

50973 Products showing for Fuses & Circuit Breakers

671 of 999+
  • RS Stock No. 130-376
  • Mfr. Part No. LV429319
Each
£105.49
  • RS Stock No. 624-3152
  • Mfr. Part No. NANOSMDC075F-2
Each (In a Pack of 10)
£0.316
  • RS Stock No. 260-7458
  • Mfr. Part No. C10V36M050
Each
£2,183.36
Better World
  • RS Stock No. 191-6125
  • Mfr. Part No. A9R67625
Each
£146.43
  • RS Stock No. 299-992
  • Mfr. Part No. 5SJ4330-8HG42
Each
£250.11
  • RS Stock No. 218-8559
  • Mfr. Part No. 1492-D2C250
Each
£90.84
  • RS Stock No. 237-6212
  • Mfr. Part No. 1SDA067015R1 XT2N 160 TMA 50A FF
Each
£219.68
  • RS Stock No. 202-498
  • Mfr. Part No. 1STQ007403A0000
Each
£87.74
  • RS Stock No. 184-9047
  • Mfr. Part No. CPB1040C
Each
£4.99
Better World
  • RS Stock No. 790-7365
  • Mfr. Part No. A9C65440
Each
£598.66
  • RS Stock No. 200-015
  • Mfr. Part No. 2CDS271001R0488
Each
£33.25
  • RS Stock No. 237-5090
  • Mfr. Part No. 2CSR253101R1504
Each
£361.28
  • RS Stock No. 130-400
  • Mfr. Part No. C2544B250
Each
£2,339.72
Better World
  • RS Stock No. 254-6326
  • Mfr. Part No. C12B34V160L
Each
£1,310.28
  • RS Stock No. 182-1559
  • Mfr. Part No. 63NHM00B-690
Each (In a Box of 3)
£8.427
Better World
  • RS Stock No. 211-2417
  • Mfr. Part No. M9F42205
Each
£135.72
  • RS Stock No. 181-8659
  • Mfr. Part No. BC63
Each
£12.75
  • RS Stock No. 275-0163
  • Mfr. Part No. AP1-1-50-502
1 Box of 5
£1,036.36
Better World
  • RS Stock No. 254-6305
  • Mfr. Part No. C11B3TM050L
Each
£328.46
  • RS Stock No. 266-3189
  • Mfr. Part No. 0 170 50
1 Box of 3
£133.86
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