"Homer J Simpson" wrote in message
news:0pv5h.714$_Z2.50@edtnps89...

"Morse" wrote in message
...

Thinking about it a bit more- the closest approximation I can come up
with would be four 30v zeners in a serial-parallel combo. Two zeners in
series with anodes together in parallel with two zeners in series with
cathodes together. This would drop 30.6 ish volts in either direction if
I'm not mistaken.

IIRC, a diac is like a triac with no gate - when it fires the dropped
voltage is a couple of volts only. This is unlike a zener.


Ah right, that buggers up that theory then!

Morse