Hi all,
For a good while now, I've been following many of Dave's teardown videos, and find stuff like this really exciting and interesting.
At the moment I've got a simple 240VAC to 12VAC/3VA isolation transformer and I want to use this to build a basic "input stage" PCB to use for future projects.
https://export.farnell.com/carel/tra12un100/transformer-240vac-in-12vac-out/dp/645400 Ultimately this will become the first stage of a DC-DC switch-mode PSU. I want to repurpose the 'DaveCAD' version as the EMI filtering input stage.
Looking at the mains input circuitry (attached), I've figured out a couple parts:
(0) HRC fuses, can use something sensible.
(1) TDK B32922, B32923, B32924, B32926 Series
Radial Leaded, Metallized Polypropylene, Film Capacitors
https://www.digikey.com/catalog/en/partgroup/b32922-b32923-b32924-b32926-series/74367The image shows a "u33" 300VAC jobbie, so I assume this is a 0.33uF?
(2) Common-mode Ferrite choke with 2-separate windings. Can you recommend a part for this?
(3) Grey caps - no idea?
(4) 4x inductors with Yellow cores - ideas?
(5) MOVs for overload protection- any ideas?
Thanks!