Dual pre-biased transistor — what it saves on the board
The Infineon BCR35PNH6327XTSA1 packs one NPN and one PNP pre-biased transistor into a single SOT-363 package. Each transistor has a 10 kΩ base resistor (R1) and a 47 kΩ emitter-base resistor (R2) integrated on-chip, so you drop the two external resistors per channel from the BOM. This is a space-saving move for low-side switching, relay and solenoid drivers, and logic-level translation where you need complementary outputs without populating four passives.
50 V, 100 mA — the operating envelope
Collector-emitter breakdown is rated at 50 V, and each transistor handles up to 100 mA continuous collector current. That covers 24 V industrial logic rails, 12 V automotive loads, and 5 V / 3.3 V GPIO-driven switching with comfortable margin. The 150 MHz transition frequency means it keeps up with PWM switching into the low-MHz range, though the pre-biased resistors limit base drive — this is a saturated-switch part, not a linear amplifier.
Infineon has marked the BCR35PNH6327XTSA1 as Last Buy. That means the manufacturer has stopped regular production and is fulfilling final orders on a fixed schedule. Once that window closes, the only channel is surplus and independent distribution. If this part is on your active BOM, you need to secure lifetime buy quantities now or qualify a replacement.