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Jim Thompson Jim Thompson is offline
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Default relay coil inductance

On Sat, 05 Sep 2009 22:28:38 -0700, Robert Baer
wrote:

Jim Thompson wrote:
I haven't done a relay driver circuit for, literally, eons.

Where do I look for reed relays that work on 3.3V supplies with
specications for the coil inductance?

Thanks!

...Jim Thompson

Who cares?
Just use the standard RC snubber across the coil; 100 ohms should be
fine.


You should learn to read... it's a custom chip issue. I posted a link
to a proper solution.

BTW, 100 Ohms and a coil current of 33mA would produce 6.6V (net, 3.3V
supply) on the drain, exceeding the 5.5V maximum operating rating.

...Jim Thompson
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