Pre-biased PNP for digital switching
The Infineon BCR 192F E6327 is a PNP pre-biased transistor in a SOT-723 package, designed for digital switching applications where the bias resistors are integrated on-chip. The built-in 22 kΩ base resistor (R1) and 47 kΩ emitter-base resistor (R2) set the turn-on threshold and provide a defined off-state, eliminating two external resistors per channel and saving board area. With a collector-emitter breakdown voltage of 50 V and a maximum collector current of 100 mA, it handles low-side switching in 5 V and 12 V logic-level loads — relay coils, LED drivers, small solenoid valves — without needing a separate base-drive network.
200 MHz ft — switching speed margin
The 200 MHz transition frequency gives plenty of margin for PWM frequencies up to several megahertz, so the transistor stays in saturation with clean edges even when driving capacitive loads like MOSFET gates or long cable runs. The 300 mV Vce(sat) at 500 µA base current and 10 mA collector current is typical for a pre-biased PNP in this current range — expect a few hundred millivolts of headroom loss, which matters if the load supply is marginal.
Infineon lists the BCR 192F as obsolete.
