The powerful 37x195 ammunition is quoted as penetrating 48mm / 500m / 90 degrees, enough to pose a threat to the side or rear armour of virtually any tank.
IL-2 used BZT-37 ammunition against armors, its penetration shown in my previous post. I didnt know where 48mm at 500m comes from.
btw, I was blind, first column on diagram is for 50mm armor.