Design no, however a couple of built to order legacy products using them for phase angle triggering of thyrisor/triac industrial power controllers, one for a vibratory conveying system, the other a magnetic reluctance VSD.
Both units use the obsolete 2N2646 of which the remaining stock is watched carefully, it's not that they can't be re-engineered, I just don't think they will: at least not for the VSD anyhow
![Flogging A Dead Horse :horse:](https://www.eevblog.com/forum/Smileys/default/DeadHorse.gif)
I didn't think anyone actually still made them?
Regards,
X.