Jeethu Rao wrote:
>
> Csaba,
>
> > Why not use igbt or powerfet? Cheep, have a ttl comp driver chip, you
> > can turn off anytime you want, etc.
>
> AFAIK, Triacs are a lot more cheaper than IGBTs or Power Mosfets.
> Atleast that is the case in India.

Some low quantity price in Hungary:

thyristor 81RIA120   1200V 80A cc 22$
thyristor bt151       650V 12A cc .5$

IGBT      BUP314D    1200V 42A cc 8.4$
IGBT      IRG4PC 50F  600V 70A cc 7.4$
IGBT      BUP200     1200V 3.5A cc 1$

PowerFet  buk 444    500V 1.9A  1.25$
PowerFet  buk 455    600V   4A    1$

IR2151 driver for igbt cc 1$
U 208B Thyr. driver    cc 1$

> And since they still are in production, its ample proof that
> a lot of people still use em.
>
> Don't take me for a Thyristor loyalist.
>
> But Triacs and SCRs can be very useful at times.

Yes, but they have their own limits.

udv
Csaba

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