Re: [[EE] Resistor power rating

vishay makes some nice pulse rated 2512's that have some graphs where you
can look this up in

On Mon, Dec 8, 2025 at 2:09 PM David VanHorn <[email protected]> wrote:

> Normally, resistor power ratings assume 100% duty cycle, so 1/0.016 would
> be a first approximation, but the part may not be capable of withstanding
> that much pulsed power.
> Unfortunately, the low duty cycle ratings are hard to find on most
> resistors.
>
>
> On Mon, Dec 8, 2025 at 11:37 AM David C Brown <[email protected]> wrote:
>
> > 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
> > Whaley Bridge
> > High Peak                           Phone: 01663 780582
> > Derbyshire                eMail: [email protected]
> > *SK23 7ND          web: www.bings-knowle.co.uk/dcb
> > <http://www.jb.man.ac.uk/~dcb> *
> >
> >
> >
> > *Sent from my etch-a-sketch*
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-- 
Jason White
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