Pre-biased PNP in a tiny SOT-883 package
The Infineon BCR 198L3 E6327 is a PNP pre-biased transistor with two integrated 47 kOhm resistors — one in the base leg (R1) and one between emitter and base (R2). That built-in bias network eliminates two external passives, shrinking the footprint for switching and driver stages where board space is tight. Maximum power dissipation is 250 mW, which sets the thermal budget in a compact SOT-883 (PG-TSLP-3-4) package.
With R1 and R2 both at 47 kOhms, the base current is set by the input voltage and the resistor divider, so the transistor turns on at a predictable threshold without an external base resistor. This is useful in digital-output or microcontroller-driven loads where you want a clean on/off characteristic with minimal component count. Vce saturation is 300 mV maximum at 500 µA base drive and 10 mA collector current — a reasonable figure for a logic-level switch at moderate load. The minimum DC current gain (hFE) is 70 at 5 mA collector current and 5 V Vce, which gives enough headroom for most low-current relay, LED, or small solenoid drivers.