The 2N1890 from New Jersey Semiconductor is a Bipolar Junction Transistor with Emitter Base Voltage 7 V, Base Emitter Saturation Voltage 0.9 to 1.3 V, Emitter Cut off Current 5 nA, Collector Base Voltage 100 V, Collector Cut off Current 10 nA. Tags: Through Hole, NPN Transistor. More details for 2N1890 can be seen below.