Input power protection for PAN4820
It is rated for 76V and 100V absolute Max verified  1 min. @ 100Vdc.
The susceptibility to 8/20us surge test for ionization tolerance is much higher than 50 Hz or DC and is perhaps double between enamelled copper windings YET not mentioned.  I believe lightning tests are common-mode around 6kV to 10kV, while Hipot is under 1kV CM, 100V diff.
So the question is how well balanced and what is the impedance ratio and CMRR from line to load that would impart a differential or leg to the ground voltage from common-mode induced lightning. ( it won't survive a direct hit differential mode but is also unlikely.)
165V TVS is good for ESD yet we know ESD from 100pF into x Ohms TVS has rise time in ns.
But if you are getting it certified to certain EU standards, that's beyond my paygrade which is 0 in retirement near Toronto.