The Infineon BCR148SE6327BTSA1 is a dual NPN pre-biased transistor array in a 6-VSSOP, SC-88, SOT-363 surface-mount package. Each transistor integrates two 47kΩ resistors — one in series with the base (R1) and one from base to emitter (R2) — eliminating the need for external bias resistors in low-current switching applications. With a collector-emitter breakdown voltage of 50V and a maximum collector current of 100mA, it is suited for driving small relays, LEDs, or logic-level loads from a microcontroller output without additional components. The 100MHz transition frequency supports switching up to moderate-speed digital signals.
Obsolete — sourcing through independent distribution
The BCR148SE6327BTSA1 carries an obsolete lifecycle status.
Key ratings for the BOM decision
The 50V collector-emitter breakdown voltage sets the maximum rail voltage for the switching load — adequate for 24V industrial logic or 12V automotive auxiliary circuits. The 100mA collector current limit per transistor means each output drives a load drawing up to 100mA; for higher current, parallel the two NPN stages or select a higher-rated device. The 250mW total power dissipation (package limit) governs thermal derating: at 85°C ambient, derate to roughly 160mW. The 47kΩ base resistor (R1) and 47kΩ base-emitter resistor (R2) provide a fixed bias that turns the transistor fully on with a 3.3V or 5V logic-level input, simplifying the drive interface.