The 2N4401 from Multicomp Pro is a through-hole, NPN bipolar junction transistor in a TO-92 package. It is suitable for general-purpose switching and amplification applications. Key specifications include a collector-emitter voltage of 40V, a continuous collector current of 600mA, and a power dissipation of 625mW. The transistor operates within a junction temperature range of -55°C to 150°C, with a collector-emitter saturation voltage below 750mV at 500mA collector current, and a DC current gain greater than 20 at 0.1mA collector current. It is commonly used in signal processing, power management, portable devices, consumer electronics, and industrial applications.