2N4401 NPN General Purpose Amplifier This transistor device is designed for use as a medium power amplifier and switch requiring collector currents up to 500 mA. Specifications Collector-Emitter Voltage (max.): 40V DC current gain (min.): 40 hFE Collector current (max.): 600 mA Package: TO-92 Formed leads, 0.1" pitch For more about Transistors, click here.