AEC-Q101 pre-biased PNP for automotive and industrial switching
The Infineon BCR196TE6327 is a PNP pre-biased transistor in the SOT-23-3 package, qualified to AEC-Q101 for automotive applications. It integrates a 47 kΩ base resistor (R1) and a 22 kΩ emitter-base resistor (R2), reducing external component count on the board. Collector current is rated at 70 mA maximum, with a collector-emitter breakdown voltage of 50 V and a transition frequency of 150 MHz.
The 70 mA collector current ceiling sets the practical limit for driving relays, small solenoids, LED arrays, or logic-level loads. At 10 mA collector current the VCE(sat) is 300 mV typical with 500 µA base drive, keeping conduction losses low. The 100 nA cutoff leakage (ICBO) suits battery-powered or high-impedance nodes where off-state current must be minimal.
Bias resistor ratio and drive margin
With R1 = 47 kΩ and R2 = 22 kΩ, the input current is set by the base resistor; the emitter-base resistor provides a defined off-bias. The 50 minimum DC current gain at 5 mA, 5 V ensures adequate drive for saturated switching. Designers should verify the base drive available from the upstream logic or driver against the 70 mA collector target.
