Hi! I was wondering why you used the 73°C thermal fuse specifically? I’m assuming it’s what you had lying around and any value of, say 70-85°C will do? Or is there a specific reason for that specific value?
I’m asking since that specific value (+/- 1°C) keeps popping up everywhere:

https://everythingesp.com/if-youre-like-me-you-constantly-find-that/
https://forum.arduino.cc/t/hlk-pm01-power-supply/427005
https://easyeda.com/matimoto/HLK_PM01-33b4760fcdff46b6b71784304f89c379

Thanks in advance!