[[EE] Resistor power rating

David C Brown <[email protected]> Mon, 8 Dec 2025 18:34:31 +0000

Newsgroups	gmane.comp.hardware.microcontrollers.pic
Message-ID	<CAFo_nNokKdj_ZpkkaOAKCm-=rAMCHN9E7+Cb9pTsesNWVnwXTA@mail.gmail.com>

I am planning to use a 2R2 resistor to limit the current to a solenoid to
6amps.
Ohms law says that the power dissipation is about 80watts.

But the duration of the current pulse is only 16mS.   Does that mean that I
can get away with a lower power rating and, if so, how much lower?
__________________________________________
David C Brown
43 Bings Road
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Derbyshire                eMail: [email protected]
*SK23 7ND          web: www.bings-knowle.co.uk/dcb
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