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.

50958 Products showing for Fuses & Circuit Breakers

154 of 999+
Better World
  • RS Stock No. 211-2334
  • Mfr. Part No. M9F21120
Each
£28.01
  • RS Stock No. 282-7020
  • Mfr. Part No. 174196 IKA-1/8-ST
Each
£51.55
Better World
  • RS Stock No. 214-2062
  • Mfr. Part No. M9F11203
Each
£84.02
  • RS Stock No. 229-231
  • Mfr. Part No. 10NZ01 FUSE D01 10A 400V AC T GL/GG E14
1 Pack of 10
£9.18
  • RS Stock No. 738-2876
  • Mfr. Part No. 015401.5DRT
Each (In a Pack of 10)
£2.963
Better World
  • RS Stock No. 806-7281
  • Mfr. Part No. A9F53204
Each
£92.21
  • RS Stock No. 270-7945
  • Mfr. Part No. 3404.0009.22
Each
£0.77
  • RS Stock No. 771-0489
  • Mfr. Part No. 3062766
Each
£29.21
  • RS Stock No. 563-352
Each (In a Pack of 10)
£0.282
  • RS Stock No. 418-9551
  • Mfr. Part No. 70-059-61/3.15A
Each (In a Pack of 10)
£0.606
  • RS Stock No. 293-8222
  • Mfr. Part No. 0 123 20
Each (In a Pack of 10)
£1.361
  • RS Stock No. 180-6119
  • Mfr. Part No. 0 133 16
Each (In a Box of 10)
£1.85
  • RS Stock No. 181-8916
  • Mfr. Part No. SSD25
Each
£2.48
  • RS Stock No. 312-3667
  • Mfr. Part No. GB2CB09
Each
£27.45
  • RS Stock No. 226-2958
  • Mfr. Part No. 8WA1822-7EF25
Each (In a Pack of 10)
£1.413
  • RS Stock No. 236-7235
  • Mfr. Part No. 1SDA067283R1 TMG 160-480 XT2 4p
Each
£237.07
Better World
  • RS Stock No. 225-5995
  • Mfr. Part No. 2CDS251001R0428 S201 Z 10A - 10 KA
Each
£33.35
  • RS Stock No. 416-691
  • Mfr. Part No. AF1X0038021F2D
Each
£19.93
  • RS Stock No. 458-8497
  • Mfr. Part No. KTK-3/4
Each (In a Pack of 5)
£8.258
  • RS Stock No. 175-0369
  • Mfr. Part No. REX12-TA1-107-DC24V-10A
Each
£38.02
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