@sundberg84 said in 
HLK-PM01 breakout board:
@beic hi. Please see the thread above yours
There is no value mentioned there, and how did you calculated the tp peak of the sine for varistor against mains?
You just trow some varistor value in there without calculating anything for RMS and Vpp?!
I know it's an old topic, but I need to ask...
I read all this things mentioned on this topic, but at the end I did not find any answer to the fuses and for the varistor.
So, I wonder what values was used:
And also one suggestion about that thermal fuse, it would be better to use KSD-01 (normaly closed type) at 65C degree.
Dear @sundberg84 can you please read and write here the Varistors exact model/part number from your assembled board, please?