Some Panasonic capacitors have an A suffix that is calling out high temperature lead-free solder reflow compatibility.
EEE-1HA220WAP | EEE-1HA220WP is a comparison example.
Some processes have gone “green” and use lead-free solder processes. Since lead-free solder by nature requires higher temperature for reflow, it is important to have a component that can handle the higher reflow temperature, which is different than the operating or storage temperature.
Reference Link:
https://industrial.panasonic.com/cdbs/www-data/pdf/RDE0000/ABA0000C1142.pdf
Summary
PCE4613TR-ND
PCE4613CT-ND
PCE4613DKR-ND
EEE1HA220WAP
PCE4613TR
s series
PCE3920TR-ND
PCE3920CT-ND
PCE3920DKR-ND
EEE1HA220WP
PCE3920TR