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.

50914 Products showing for Fuses & Circuit Breakers

382 of 999+
Better World
  • RS Stock No. 210-3349
  • Mfr. Part No. 5SL4120-6
Each
£17.98(exc. VAT)
  • RS Stock No. 210-7003
  • Mfr. Part No. 3NW6303-1
Each (In a Pack of 10)
£3.99(exc. VAT)
  • RS Stock No. 517-6556
  • Mfr. Part No. RXEF005
Each (In a Pack of 10)
£0.338(exc. VAT)
  • RS Stock No. 266-3696
  • Mfr. Part No. 010206
1 Box of 10
£13.99(exc. VAT)
Better World
  • RS Stock No. 383-2147
  • Mfr. Part No. 5SY4325-7
Each
£80.14(exc. VAT)
Better World
  • RS Stock No. 210-3333
  • Mfr. Part No. 3VA1125-3EF42-0AA0
Each
£246.25(exc. VAT)
  • RS Stock No. 258-211
  • Mfr. Part No. 288944 Z-D02/SE-40
1 Pack of 12
£4.20(exc. VAT)
Better World
  • RS Stock No. 221-1168
  • Mfr. Part No. LV429268
Each
£24.23(exc. VAT)
  • RS Stock No. 610-9894
Each (In a Pack of 10)
£0.409(exc. VAT)
  • RS Stock No. 246-291
  • Mfr. Part No. 125NHG0B NH FUSE 125A 500V GG/GL SIZE 0
1 Pack of 3
£17.27(exc. VAT)
  • RS Stock No. 260-8227
  • Mfr. Part No. C63N4
Each
£2,645.39(exc. VAT)
  • RS Stock No. 769-3331
  • Mfr. Part No. SS-5-2A-BK
Each (In a Pack of 5)
£0.704(exc. VAT)
Better World
  • RS Stock No. 270-3514
  • Mfr. Part No. 3VA1450-7EF42-0AA0
Each
£1,997.22(exc. VAT)
  • RS Stock No. 282-6496
  • Mfr. Part No. PV-125A-01XL-15
Each
£314.03(exc. VAT)
  • RS Stock No. 254-039
  • Mfr. Part No. 269213 NZMB2-A100-NA
Each
£504.25(exc. VAT)
  • RS Stock No. 246-2590
  • Mfr. Part No. 2CCS572001R0501
Each
£116.72(exc. VAT)
  • RS Stock No. 787-4237P
  • Mfr. Part No. 029707.5L
Each (Supplied in a Box)
£0.416(exc. VAT)
Better World
  • RS Stock No. 268-456
  • Mfr. Part No. 3VA6110-8KT41-2AA0
Each
£1,939.75(exc. VAT)
  • RS Stock No. 249-111
  • Mfr. Part No. 3VA6610-5JQ36-0AA0
Each
£5,658.89(exc. VAT)
  • RS Stock No. 181-8577
  • Mfr. Part No. 4NZ01
Each (In a Box of 10)
£2.632(exc. VAT)
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