I see you are trying to start another “I’m saving the RC world from the evil Futaba” over on RC Groups. While your research and photos indicate the chip used in the receiver has the operating range of -10C to +60C, you go on to say, “I do not think this is very responsible by Futaba.”
What does that sorry comment have to do with anything?
As I have already mentioned in this thread, RC equipment is not mil spec, and many other components we use fall into the same operating temp range.
So take off the “Savior” crown and get real. Bashing Futaba over the 2.4 equipment has become a sport for those with nothing other to blame or to wring their hands over.
Why not start a thread saving the 3D flyers from evil 3W. Gosh, their ignitions have a similar temp range and they go right behind hot cylinders or an oven baked firewall?
Boy, there a lot of sneaky manufacturers in our hobby.