Dual PNP pre-biased in a 1.6×1.6 mm footprint
The Panasonic RN2904FE,LXHF(CT packs two PNP pre-biased transistors into a single SOT-563 or SOT-666 case, each with integrated 47 kΩ base and emitter-base resistors. This eliminates two external bias resistor pairs per channel, saving board area in space-constrained automotive ECU modules, body-control units, and sensor interface stages. The AEC-Q101 qualification means the part is characterized and tested for automotive-grade reliability — under-hood and cabin environments where temperature cycling and vibration are routine.
With a 50 V collector-emitter breakdown and 100 mA maximum collector current, this dual transistor handles typical 12 V and 24 V automotive loads — relay coils, small solenoids, indicator LEDs, and logic-level translation — with margin. The 300 mV saturation voltage at 250 µA base and 5 mA collector keeps conduction losses low in the on-state. The 200 MHz transition frequency is fast enough for PWM dimming or switched-mode pre-driver stages up to several hundred kilohertz. For a design targeting 10 mA collector current at 5 V Vce, the minimum hFE of 80 guarantees adequate base-drive headroom even with worst-case resistor tolerance on the integrated bias network.