Dual PNP pre-biased in a SOT-363 footprint
The RN2902,LF(CT is a dual PNP transistor with integrated bias resistors — each half contains a 10 kOhm base resistor (R1) and a 10 kOhm emitter-base resistor (R2). That means the base drive is set by the resistor divider, so the transistor turns on when the input voltage exceeds the Vbe threshold plus the drop across R2, and the collector current is limited by the 100 mA maximum rating. The 50 V collector-emitter breakdown gives headroom for 12 V and 24 V logic rails. The 200 mW power dissipation ceiling means the total heat from both transistors — including conduction and switching losses — must stay under that limit; at 100 mA collector current the Vce(sat) of 300 mV at 250 µA base drive gives a rough 30 mW per channel, leaving margin for both in a typical low-power switching or level-shifting application.
Active production, RoHS3 compliant
The dual pre-biased configuration reduces external component count — two transistors and four resistors in a single SOT-363 package — which simplifies PCB layout and procurement for high-volume builds.