Anode of unknown diode is to ground, cathode to drain of BUZ72 MOSFET. 1uF
cap also from drain to ground. Drain connects to solenoid. Drive voltage
is
42vdc.

The diode is a snubber to bypass the inductive kick from the solenoid when
it deenergizes. A 1N4007 will work fine.

Ben Miller

--
Benjamin D. Miller, PE
B. MILLER ENGINEERING
www.bmillerengineering.com
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