Possible replacements I’ve found: KSA1010YTU, TIP32AG, MJE2955TG. Not sure which will be the best substitute for the 2N6109.
The NJW0302GOS-ND looks to be a good option from what I had found.
Hey Thanks! This looks like a better part, performance wise, but is in a different package, TO-3P-3L vs TO-220-3. The pinout is the same however so will probably work fine in TO-220-3 footprint.
Hello Scott.Brown
Recommendations for cross to
Part number KSA1010YTUOS-ND would be my recommendation.
Having the same package similar electrical characteristics this looks to be a good match.
Datasheet https://www.onsemi.com/pdf/datasheet/ksa1010-d.pdf