Dual pre-biased transistor for compact load switching
The Infineon BCR08PNH6433XTMA1 integrates one NPN and one PNP pre-biased transistor in a single PG-SOT363-PO package, each with built-in bias resistors — 2.2 kΩ base (R1) and 47 kΩ emitter-base (R2). This saves board space and reduces component count in applications like relay drivers, logic-level shifters, and low-current load switches where you'd otherwise need two discrete transistors plus four resistors.
With a 50 V Vce breakdown and 100 mA Ic rating, this part handles 24 V industrial logic rails and 12 V automotive loads with margin. The 170 MHz transition frequency means it switches cleanly into the low-MHz range — fine for PWM dimming or solenoid drive at a few hundred kHz. Saturation voltage is 300 mV at 500 µA base, 10 mA collector, so it stays cool in continuous-on applications.
Infineon lists the BCR08PNH6433XTMA1 as obsolete.