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How can i run a 12 v dc relay without the use of a capacitor... plz help me with this question. m waiting....?

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  • How can i run a 12 v dc relay without the use of a capacitor... plz help me with this question. m waiting....?


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Answer #1 | 08/02 2014 13:53
A capacitor is used to 'absorb' the inductive voltage spike of the magnetic field around the coil, when the contact that controls the relay is opened. This prevents burning and welding of the switch contacts. Most engineers use a diode connected across the coil (in the reverse voltage mode) tp collapse the field right at the relay coil. I would never recommend the use of a DC relay without the capacitor or diode (diode preferably). An AC doesn't experience as large of a voltage spike as the DC relay, due to the voltage variations during each cycle. TexMav
Answer #2 | 08/02 2014 20:47
Running a relay is no need to use a capacitor.

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