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Yes you can .connect the 230 volt capacitor series with the relay coil.

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If you are referring to the operating coil, then the answer is of course not, as you will be subjecting the coil to nearly 20 times its rated voltage! If you are referring to the contacts, then you need to check the nameplate data for the relay to find out what voltage the contacts are designed to operate at.

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Q: Can you directly connect 12 V DC 10 A relay to 230 V AC Supply main line?
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