The 2N1549 from New Jersey Semiconductor is a Bipolar Junction Transistor with Emitter Base Voltage 20 V, Collector Emitter Voltage 20 V, Continuous Collector Current 10 A, DC Current Gain 10 to 30, Power Dissipation 94 W. Tags: Through Hole, NPN Transistor. More details for 2N1549 can be seen below.