2N4992 Silicon bilateral switch (SBS) in package T.
ETC
2N4992 - Silicon bilateral switch Transistor
2N4992 Silicon bilateral switch (SBS) in package TO-92 0.7max 0.45max 1 2.5 5.2 2 14.5 1.6 4.2 5.2 3 Pinouts: 1- Anode II, 2- Gate, 3- Anode I .
