05-27-2017, 08:46 PM
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VideoKarma Member
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Join Date: Oct 2015
Location: Waxahachie, TX
Posts: 1,506
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Quote:
Originally Posted by Notimetolooz
I can reverse engineer it. So you know it is a 24V zener. From the current through R61, 40V-24V= 16V. 16/220 = 72.7 ma. If the circuit fed by the 24V was removed, (some kind of a malfunction), the zener power dissipation would be 24V X 0.0727A = 1.745 W. Call it 2 Watt. So look for a 24V, 2 W zener. Mouser has a 2EZ24D5-TP by MCC. This might be overkill but at least it could handle the current if something goes wrong.
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Cool! 24V 2W. Thank you.
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