C.<p>Measuring the characteristics of some cheap J113 / 2SJ113 n-channel JFETs I bought, so I can match them / divvy them into bins.</p><p>Put #15 of 20 into the JFET test circuit, and the power supply's current limiter kicks in ... whoops. Did I have it turned around so I swapped the terminals? Nope...</p><p>Take a peek at it. Slightly different marking. Still "J113", but the factory/date code is different. Put it in the component tester... it's a PNP BJT transistor, not a JFET at all, and with a pinout completely unsuitable for the JFET test circuit. If it had been in for more than a second, it probably would have let the Magic Smoke out.</p><p>Oh, <a href="https://mindly.social/tags/AliExpress" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AliExpress</span></a> sellers, where would <a href="https://mindly.social/tags/hobbyist" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>hobbyist</span></a> <a href="https://mindly.social/tags/electronics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>electronics</span></a> people be without you? Somewhere with less excitement in their lives, I guess.</p><p><a href="https://mindly.social/tags/MagicSmoke" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>MagicSmoke</span></a> <a href="https://mindly.social/tags/Chinesium" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Chinesium</span></a> <a href="https://mindly.social/tags/fake" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>fake</span></a> <a href="https://mindly.social/tags/remarked" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>remarked</span></a> <a href="https://mindly.social/tags/component" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>component</span></a> <a href="https://mindly.social/tags/transistor" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>transistor</span></a> <a href="https://mindly.social/tags/JFET" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>JFET</span></a> <a href="https://mindly.social/tags/BJT" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>BJT</span></a> <a href="https://mindly.social/tags/J113" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>J113</span></a> <a href="https://mindly.social/tags/hobby" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>hobby</span></a></p>