ROHM DTC124XE3HZGTL NPN Digital Transistor, 100 mA, 50 V, 3-Pin EMT3

The ROHM NPN leak absorption digital transistor this is the standard product of digital transistors which ROHM invented and marketed first in the world.

Built-in bias resistors, R1 = 22kΩ, R2 = 47kΩ