On Tuesday 13 April 2004 10:58 am, Stefan Trethan wrote:
I'm not entirely sure if the pulse can be both polarities or only the
one in which the current should flow, the datasheet can tell i hope.
(please answer if someone knows).
Tomi Engdahl has told me it can be both polarities, no matter which
polarity the main current has but i am not sure about this.
This is correct. However a triac _will_ have different sensitivity in
different "quadrants" (the term that the datasheet will used to refer to the
different combinations of gate polarity and other polarity).