2N3904 Signal Transistor. Catalog №: 2762016. $2.00 Sold-out Online. Request notification Find a store. Tweet. Maximum Power Dissipation: 350 mW. Maximum Collector ... 1996. 1. 28 1/3 semiconductor technical data kn3904 epitaxial planar npn transistor revision no : 0 general purpose application. switching application. 2N3391 Datasheet (PDF) 1.1. 2n3390 2n3391 2n3391a 2n3392 2n3393.pdf Size:296K _fairchild_semi. Discrete POWER & Signal Technologies 2N3390 2N3391 2N3391A 2N3392 2N3393 B TO-92 C E NPN General Purpose Amplifier This device is designed for use as general purpose amplifiers and switches requiring collector currents to 300 mA.

kn3904 datasheet (pdf) 1.1. kn3904s.pdf size:71k _kec semiconductor kn3904s technical data epitaxial planar npn transistor general purpose application. switching application. e features l b l dim millimeters low leakage current _ + 2.93 0.20 a b 1.30+0.20/-0.15 : icex=50na(max.) ; @vce=30v, veb=3v. At 20mA, that's about 120 Ohms. The current gain depends on the collector current, but figure on 50. With a base current of 20mA, that's a collector current of way more than the 2N3904 can handle, so 20mA will saturate it thoroughly. You can probably get by with a lower base current. Look at a 2N3904 datasheet for gain at different collector ...