PNP pre-biased transistor — what the ratings mean
The Infineon BCR 189F E6327 is a PNP pre-biased transistor in a SOT-723 package (PG-TSFP-3). The built-in 22 kΩ base resistor (R1) eliminates the external resistor needed in a standard transistor switch, saving board space and reducing BOM count for low-side switching of loads up to 100 mA collector current at 50 V collector-emitter breakdown. With a transition frequency of 200 MHz and a minimum DC current gain of 120 at 5 mA, the device handles moderate-speed switching — relay coils, LED arrays, small signal inverters — without external base drive components. The 250 mW power dissipation limit and the SOT-723 footprint mean the part is sized for low-power, space-constrained designs; thermal management is straightforward in ambient environments below 85 °C.
Obsolete — sourcing through independent distribution
Infineon lists the BCR 189F as Obsolete. For a BOM line that still calls out this exact order code, the practical channel is independent distribution — verified date-code stock from surplus or end-of-life buyback lots. A buyer should confirm the date-code range and verify that the parts have not been exposed to moisture beyond the MSL floor life.