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

180 of 999+
  • RS Stock No. 535-4324
  • Mfr. Part No. 2CDS273001R0404 S203M-C40
Each
£84.48(exc. VAT)
  • RS Stock No. 174-8017
Each (In a Box of 500)
£1.03(exc. VAT)
  • RS Stock No. 181-8727
  • Mfr. Part No. 80NHG00B
Each
£6.37(exc. VAT)
  • RS Stock No. 117-655
  • Mfr. Part No. Mi MP 1
Each
£13.73(exc. VAT)
  • RS Stock No. 177-6027
  • Mfr. Part No. 787-2861/200-000
Each
£42.97(exc. VAT)
  • RS Stock No. 124-3048
  • Mfr. Part No. EMCH340 EMCH340
Each
£111.55(exc. VAT)
  • RS Stock No. 563-659
Each (In a Pack of 10)
£0.282(exc. VAT)
  • RS Stock No. 893-8530
Each
£62.71(exc. VAT)
  • RS Stock No. 270-5241
  • Mfr. Part No. P04388
1 Box of 10
£55.90(exc. VAT)
  • RS Stock No. 335-288
  • Mfr. Part No. SE10B116
Each
£23.34(exc. VAT)
  • RS Stock No. 232-0110
  • Mfr. Part No. 1SDA054887R1 UVR-C 24VAC/DC T4-6
Each
£168.72(exc. VAT)
  • RS Stock No. 630-827
  • Mfr. Part No. L090538Q
1 Box of 10
£5.59(exc. VAT)
  • RS Stock No. 703-8664
  • Mfr. Part No. 160NHG00B
Each
£6.35(exc. VAT)
  • RS Stock No. 789-7832
  • Mfr. Part No. 0034.1520
Each (In a Bag of 10)
£0.30(exc. VAT)
  • RS Stock No. 210-4751
  • Mfr. Part No. EUR140.100/4A
Each
£65.43(exc. VAT)
  • RS Stock No. 231-9739
  • Mfr. Part No. 2CDS272337R0164 SU202M-C16
1 Box of 1
£86.79(exc. VAT)
  • RS Stock No. 248-5516
  • Mfr. Part No. FB03A1PL
Each
£36.81(exc. VAT)
  • RS Stock No. 186-3460
  • Mfr. Part No. 2CSF202102R1630
Each
£83.22(exc. VAT)
  • RS Stock No. 738-2841
  • Mfr. Part No. 0451.062MRL
Each (In a Pack of 10)
£3.754(exc. VAT)
Better World
  • RS Stock No. 806-7317
  • Mfr. Part No. A9R41425
Each
£205.97(exc. VAT)
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