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

670 of 999+
Better World
  • RS Stock No. 156-805
  • Mfr. Part No. 3VA2440-5HM32-0AA0
Each
£1,775.84
Better World
  • RS Stock No. 175-1448
  • Mfr. Part No. GV4L80N6
Each
£465.31
  • RS Stock No. 728-8608
  • Mfr. Part No. 104-PR-1.8A
Each
£13.44
Better World
  • RS Stock No. 236-6514
  • Mfr. Part No. 1SDA067974R1 XT2V 160 Ekip LS/I 100A FF
Each
£959.04
  • RS Stock No. 541-4280A
  • Mfr. Part No. 0217.125MXP
Each (In a Pack of 100)
£0.301
  • RS Stock No. 122-459
  • Mfr. Part No. LV510334P
Each
£111.97
Better World
  • RS Stock No. 209-6459
  • Mfr. Part No. 5SL4125-8
Each
£38.02
  • RS Stock No. 731-9718
  • Mfr. Part No. 4 078 27
Each
£134.28
  • RS Stock No. 167-696
  • Mfr. Part No. 5SD8063
1 Pack of 5
£192.81
  • RS Stock No. 250-4111
  • Mfr. Part No. 1SDA054378R1
Each
£3,352.91
  • RS Stock No. 173-9813
  • Mfr. Part No. 4400.0056
Each (In a Box of 100)
£5.617
  • RS Stock No. 173-7783
  • Mfr. Part No. 3413.0222.22
1 Reel of 1000
£353.92
  • RS Stock No. 260-740
  • Mfr. Part No. ESD20
1 Pack of 20
£279.40
  • RS Stock No. 255-665
  • Mfr. Part No. 269277 NZMN3-AEF350-NA
Each
£2,039.12
  • RS Stock No. 577-228
  • Mfr. Part No. 0031.1363
Each
£3.22
  • RS Stock No. 188-1753
  • Mfr. Part No. CPBM1
Each
£1.93
  • RS Stock No. 336-597
  • Mfr. Part No. PJA36060CU31A
Each
£2,511.05
  • RS Stock No. 414-853
  • Mfr. Part No. GSGB25
Each (In a Pack of 5)
£21.098
Better World
  • RS Stock No. 248-3718
  • Mfr. Part No. A9Z61240
Each
£732.28
Better World
  • RS Stock No. 219-9306
  • Mfr. Part No. A9F95332
Each
£328.76
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