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

238 of 999+
  • RS Stock No. 124-2503
  • Mfr. Part No. 7TCA083670R0650 LK243-12
Each
£172.36(exc. VAT)
Better World
  • RS Stock No. 734-9646
  • Mfr. Part No. A9F75202
Each
£157.31(exc. VAT)
  • RS Stock No. 630-849
  • Mfr. Part No. A090551Q
1 Box of 10
£5.33(exc. VAT)
  • RS Stock No. 630-864
  • Mfr. Part No. E085380Q
1 Box of 10
£12.27(exc. VAT)
Better World
  • RS Stock No. 383-2052
  • Mfr. Part No. 5SY4120-7
Each
£18.74(exc. VAT)
  • RS Stock No. 259-116
  • Mfr. Part No. 2NZ01R FUSE-D01 2A GR 400VAC E14
1 Pack of 10
£36.76(exc. VAT)
Better World
  • RS Stock No. 202-7118
  • Mfr. Part No. 5SL4116-7
Each
£17.98(exc. VAT)
  • RS Stock No. 260-7953
  • Mfr. Part No. C25N4TM200
Each
£1,900.27(exc. VAT)
  • RS Stock No. 729-2751
  • Mfr. Part No. 2-5700-IG2-P10-DD-000040-4A
Each
£23.00(exc. VAT)
  • RS Stock No. 454-8146
  • Mfr. Part No. 259086 NZMN1-A125
Each
£596.76(exc. VAT)
  • RS Stock No. 260-8006
  • Mfr. Part No. C25V36E250
Each
£3,693.70(exc. VAT)
  • RS Stock No. 541-4656
  • Mfr. Part No. 0215.315MXP
Each (In a Pack of 10)
£1.426(exc. VAT)
  • RS Stock No. 454-9818
  • Mfr. Part No. 21100448
Each
£8.33(exc. VAT)
  • RS Stock No. 125-1430
  • Mfr. Part No. 1492-SPM2B040
Each
£44.83(exc. VAT)
Better World
  • RS Stock No. 236-6799
  • Mfr. Part No. 1SDA068540R1 XT4H 250 Ekip I 250A FF
Each
£1,115.85(exc. VAT)
  • RS Stock No. 228-614
  • Mfr. Part No. 7.2WFNHO80 7.2KV 80A 3" MOTOR START FUSE
1 Pack of 3
£1,344.39(exc. VAT)
Better World
  • RS Stock No. 222-3854
  • Mfr. Part No. NSYEB2025D8
Each (In a Pack of 10)
£14.574(exc. VAT)
  • RS Stock No. 207-156
  • Mfr. Part No. EZ9E16MCU
Each
£102.04(exc. VAT)
Better World
  • RS Stock No. 790-8743
  • Mfr. Part No. A9F55463
Each
£240.54(exc. VAT)
Better World
  • RS Stock No. 160-236
  • Mfr. Part No. 3RV2421-4BA15
Each
£96.39(exc. VAT)
Results per page