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.

50907 Products showing for Fuses & Circuit Breakers

611 of 999+
  • RS Stock No. 233-0567
  • Mfr. Part No. BK14-HTC-613M
1 Box of 1400
£3,194.59(exc. VAT)
  • RS Stock No. 726-8846
  • Mfr. Part No. C1014578 / FR10GR69V12.5
Each
£7.10(exc. VAT)
  • RS Stock No. 233-0588
  • Mfr. Part No. BK2-HTC-623M
1 Box of 2000
£4,563.71(exc. VAT)
  • RS Stock No. 261-875
  • Mfr. Part No. BH-1133
Each
£269.56(exc. VAT)
  • RS Stock No. 178-1082
  • Mfr. Part No. M226331 / BTTM42V630
Each
£123.90(exc. VAT)
Better World
  • RS Stock No. 232-2310
  • Mfr. Part No. 5SY5108-7
Each
£75.65(exc. VAT)
  • RS Stock No. 866-3564
  • Mfr. Part No. 0031.2201
Each (In a Pack of 25)
£23.028(exc. VAT)
Better World
  • RS Stock No. 238-3383
  • Mfr. Part No. A9P32310
Each
£142.55(exc. VAT)
  • RS Stock No. 667-0346
Each (In a Box of 10)
£6.077(exc. VAT)
  • RS Stock No. 289-1629
  • Mfr. Part No. 2CSS255102R0061
Each
£24.01(exc. VAT)
  • RS Stock No. 396-225
  • Mfr. Part No. 3NC1420
Each (In a Pack of 10)
£17.978(exc. VAT)
  • RS Stock No. 121-231
  • Mfr. Part No. 170150 FBSMV-40/3/1-S
Each
£165.87(exc. VAT)
  • RS Stock No. 260-9540
  • Mfr. Part No. C10R42D100
Each
£1,450.19(exc. VAT)
  • RS Stock No. 611-0068
Each (In a Pack of 10)
£0.802(exc. VAT)
  • RS Stock No. 136-0485
  • Mfr. Part No. P1023007 / 2.030.000
1 Box of 1
£67.03(exc. VAT)
  • RS Stock No. 272-2298
  • Mfr. Part No. 225524 CI-K4-PKZ4-G
Each
£59.80(exc. VAT)
  • RS Stock No. 230-673
  • Mfr. Part No. 111658 NZMN3-4-AE630-BT
Each
£3,414.97(exc. VAT)
  • RS Stock No. 250-8587
  • Mfr. Part No. LF300G
Each (In a Pack of 10)
£8.072(exc. VAT)
  • RS Stock No. 252-5374
  • Mfr. Part No. 1077106
Each
£106.59(exc. VAT)
  • RS Stock No. 600-7338
  • Mfr. Part No. 3410.0029.01
Each (In a Pack of 20)
£2.486(exc. VAT)
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