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.

50915 Products showing for Fuses & Circuit Breakers

331 of 999+
  • RS Stock No. 254-958
  • Mfr. Part No. 236970 PXK-C10/1N/03-A
Each
£176.87(exc. VAT)
  • RS Stock No. 231-922
  • Mfr. Part No. 111731 NZMH3-VE400-BT
Each
£2,670.92(exc. VAT)
  • RS Stock No. 173-7895
  • Mfr. Part No. 8020.0517.PT
1 Box of 1000
£247.42(exc. VAT)
  • RS Stock No. 849-5620
  • Mfr. Part No. ATC-2
Each
£1.16(exc. VAT)
Better World
  • RS Stock No. 211-2365
  • Mfr. Part No. M9F22170
Each
£28.91(exc. VAT)
  • RS Stock No. 120-976
  • Mfr. Part No. 168200 FRBDM-B16/2/003-G/A
Each
£148.77(exc. VAT)
  • RS Stock No. 180-6115
  • Mfr. Part No. 0 133 04
Each (In a Box of 10)
£1.85(exc. VAT)
  • RS Stock No. 521-2731
Each
£40.17(exc. VAT)
  • RS Stock No. 248-916
  • Mfr. Part No. 187165 AFDD-10/2/B/001-A
Each
£191.33(exc. VAT)
  • RS Stock No. 218-8859
  • Mfr. Part No. 1492-SPM3C250-N
Each
£95.68(exc. VAT)
  • RS Stock No. 852-7092
  • Mfr. Part No. MDA-8-R
Each
£2.40(exc. VAT)
Better World
  • RS Stock No. 236-6696
  • Mfr. Part No. 1SDA068329R1 XT4S 250 TMA 200A FF
Each
£693.03(exc. VAT)
  • RS Stock No. 223-2862
  • Mfr. Part No. 68720250
Each (In a Pack of 3)
£23.933(exc. VAT)
  • RS Stock No. 129-488
  • Mfr. Part No. 1208801
Each
£7.22(exc. VAT)
  • RS Stock No. 275-3895
  • Mfr. Part No. 3NX1016
Each
£178.01(exc. VAT)
  • RS Stock No. 334-986
  • Mfr. Part No. KSA1000DZE43F
Each
£3,648.72(exc. VAT)
  • RS Stock No. 277-6091
  • Mfr. Part No. 550190
Each (In a Pack of 10)
£62.64(exc. VAT)
  • RS Stock No. 181-8493
  • Mfr. Part No. NSD32M50
1 Box of 20
£181.68(exc. VAT)
  • RS Stock No. 852-7095
  • Mfr. Part No. MDL-1-10-R
Each
£6.71(exc. VAT)
  • RS Stock No. 448-3437
  • Mfr. Part No. K320169
Each
£38.46(exc. VAT)
Results per page