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I Need help about Gate two triacs (BTA41-600B).

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julius64

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Hi:
I need to know if I can to connect two triacs like I show in this schematic, and I need to know if the location of the Ground (1 and 2) is correct for my application.

I triggered one of them (the triacs with ground 1) without the other (closing the circuit in ground 0) and I dont have problem, but when I connect two triacs like this circuit, my optocouplers died.

This triacs have to trigger with a microcontroller (with simultanous output)
I use the TLP250 optocouplers.
I dislike use the MOC optocoupler with zero cross, because it isn`t good for my application.

if you can help me, very thank.
Best regards!!
 

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If the three "ground" nodes involve full galvanic isolation, there shouldn't be a problem. I would prefer a complete schematic
however. The shown principle circuit is missing import details. It's e.g. not showing the required gate resistors and the origin of power supplies.

Did you notice b.t.w. that opto triacs without zero crossing detector are available as well, e.g. MOC3020. They are mostly used with inductive loads. Snubber circuits are however required to prevent triggering by inductive spikes.
 
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