Last Buy — plan your final orders
Infineon has marked the BCR185WH6327XTSA1 as Last Buy, meaning it is in its final production window and will not be manufactured indefinitely. If this part is on your BOM, secure your lifetime buy or qualification run now — once stock dries up, only surplus and broker channels will carry it.
What this PNP pre-biased transistor does
The BCR185WH6327XTSA1 is a PNP pre-biased transistor — it integrates a 10 kΩ base resistor (R1) and a 47 kΩ emitter-base resistor (R2) inside the same SOT-323 package. That saves two external resistors on the board and shrinks the footprint for switching and interface applications where you need a simple, low-side PNP switch. The 200 MHz transition frequency keeps it fast enough for general-purpose switching up to low-MHz rates, and the 50 V collector-emitter breakdown gives headroom on 24 V or 48 V industrial rails.
Field-swap friendly — SC-70 / SOT-323
In the SC-70 (SOT-323) package, this part is small enough for dense boards but still hand-solderable with tweezers and a fine-tip iron. No hot-air station required for a field swap — just a steady hand and good lighting. The PG-SOT323 supplier package designation matches the standard SOT-323 footprint, so no special land pattern is needed.
Key ratings for your BOM
Collector current is rated 100 mA max, with a saturation voltage of 300 mV at 500 µA base current and 10 mA collector current — that is a clean, low-drop switch for logic-level loads. The DC current gain minimum of 70 at 5 mA, 5 V ensures consistent drive across temperature. Off-state leakage is just 100 nA (ICBO), so it will not load down high-impedance nodes when off.