niconiconiProblem solved, a n00b mistake. The SCR was incorrectly wired as a high-side switch, not a low-side one. As the load was switched on, the gate and cathode would rise to 200 volts, an exploding gate drive transistor was guaranteed... ⚡ ? Replaced it with a high-voltage one as a temporary fix, now it works fine. :blobfacepalm: #electronics
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