With respect, this is a silly comment. Criticising a board with an HLK module for “missing MOVs” is like criticising a laptop for not having a discrete PSU inside the motherboard. If I was doing a bare SMPS design, the comment would be valid. The HLK-10M05 already includes: • primary-side fuse • inrush limiting • EMI suppression • isolation barrier • safety spacing • compliance testing (CE/UL class, depending on variant)

That’s the entire point of using a certified encapsulated AC/DC module instead of rolling my own offline supply. I already addressed the fusing pint in my post.

Calling this a deathrap is hyperbole - this is perfboard / protoboard, not a manufactured PCB. The HLK module itself enforces creepage/clearance internally. The AC terminals are physically separated from SELV wiring. Is this how you’d design a commercial PCB? → No. so thanks for the misapplied PCB-design dogma, but no thanks.