BD442STU

The BD442STU is a PNP bipolar junction transistor manufactured by On Semiconductor. It is designed for general-purpose switching and amplification applications requiring moderate voltage and current handling. The device features a collector-emitter breakdown voltage of 80V and a collector current rating of 4A, making it suitable for a range of power control circuits.

With a power dissipation of 36W and a maximum junction temperature of 150°C, the BD442STU can handle significant thermal loads when properly heatsinked. The DC current gain (hFE) is specified at a minimum of 40 at a test condition of 500mA collector current and 1V collector-emitter voltage, ensuring consistent performance in linear applications. The collector-emitter saturation voltage is limited to 800mV at a base current of 200mA and collector current of 2A, which helps minimize power loss in switching applications.

The transistor is housed in a TO-225AA / TO-126-3 package with through-hole mounting, facilitating easy integration into printed circuit boards. Its transition frequency of 3MHz indicates suitability for low-frequency switching and audio-frequency amplification. The BD442STU is a reliable choice for designers needing a PNP transistor with robust current and voltage ratings in a compact, industry-standard package.