Trying to figure out what this is, and suitable replacements. Markings are "1 Wt 77" Cannot seem to find anything.

enter image description here

Edit: I removed and sized it today, looks like 2.04 mm square package, exactly like the one on the below spec sheet... but not that part. Still cannot find those markings...

SiA936EDJ (not a 1Wt)

  • \$\begingroup\$ Hmm, 1Wt = SOT-323 Philips (NXP) BF822W NPN transistor. Is that a SOT-6 package? \$\endgroup\$
    – rdtsc
    Sep 25, 2020 at 18:54
  • \$\begingroup\$ Hi thank you! it's smaller than the SOT-6 package size... from what I can tell it's closer to this package size: 6-WDFN \$\endgroup\$
    – AMB
    Sep 25, 2020 at 19:27
  • \$\begingroup\$ It was 6 pins and I believe is a dual fet chip... not sure if its dual N, dual P or N and P though... \$\endgroup\$
    – AMB
    Sep 25, 2020 at 19:30
  • \$\begingroup\$ Hmm, could it be a SOT-666 package? May have to measure it. \$\endgroup\$
    – rdtsc
    Sep 26, 2020 at 18:35

1 Answer 1


I removed and sized it today, looks like 2.04 mm square package that looks exactly like the one on the attached spec sheet... but not the same...cannot find those markings...enter image description hereenter image description here


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