all SMT. Caps are listed as "generic" on the BOM.
This is not my design, it is inherited, I just had to replace the chips specified to make the signs survive.
The driver drives up to the bus in his car, jumps in, start the bus that is sitting in the sun jump back to his AC cooled car and sit there for 15 minutes till the bus AC has taken effect. While the AC takes effect, the signs do not actually work, but they are fully functional by the time the bus is ready for passengers.

If you have a need for high temp SMT caps, I can get brand etc from the contract manufacturer.

Erik