D
D from BC
Yikes, that's ~0.5 mm. Still below 1 kV/mm but much too close for
comfort. I suggest something like 80 mil minimum for that kind of
voltage.
I've seen a PCB burned up by 150 V on traces separated by 3 mm (~120
mil). It was phenolic, and got dirty, humid, whatever. The leakage
heated the PCB at some spot and then the charring made it increasingly
worse. Burned it through for the whole length the traces ran together.
- YD.
I might spray the board to prevent arc over due to junk landing on the
pcb.. (The pcb is not in a sealed box.)
Perhaps something from a paint store might be a cheap and convenient
solution..
Let's see...
polyurethane
acrylic
lacquer
high heat engine clear coat
http://www.duplicolor.com/products/engine.html
I wonder which one to use...
D from BC