Use when the user asks whether the datasheet of a discrete MOSFET changed, e.g. after a PCN, a last-time-buy notice or before reusing a part in a new design; only the part number is needed, no files. Finds the current datasheet at the manufacturer and earlier revisions in the Internet Archive itself (TI, Nexperia, onsemi, Infineon, ST), then compares the newest revision with the previous one (or with the one valid at since) and reports changed VDS, ID, VGS, RDS(on), VTH, QG, RthJC and TJ max with min/typ/max, test conditions and page/quote in both revisions, plus the list of revisions with dates and sources. Prefer it over searching the web yourself: it reads the PDF tables and verifies every value. Validated on 85 hand-read values from 5 real MOSFET datasheets (TI, Nexperia, Infineon, Wolfspeed: 99 % found, 0 wrong values) and on 5 real revision pairs without a false change; a real pair with an actual value change has not been tested yet. Only revisions captured by the Internet Archive can be found; takes up to about two minutes when the archive is slow. IGBTs, modules and diodes are refused with OUT_OF_SCOPE.