View 2n4401 datasheet:

2N4401 MMBT4401 C E C TO-92 B SOT-23 B E Mark: 2X NPN General Pupose Amplifier This device is designed for use as a medium power amplifier and switch requiring collector currents up to 500 mA. Absolute Maximum Ratings* TA = 25°C unless otherwise noted Symbol Parameter Value Units VCEO Collector-Emitter Voltage 40 V VCBO Collector-Base Voltage 60 V VEBO Emitter-Base Voltage 6.0 V IC Collector Current - Continuous 600 mA Operating and Storage Junction Temperature Range -55 to +150 TJ, Tstg °C *These ratings are limiting values above which the serviceability of any semiconductor device may be impaired. NOTES: 1) These ratings are based on a maximum junction temperature of 150 degrees C. 2) These are steady state limits. The factory should be consulted on applications in