Infineon lists the BCR141SH6327XTSA1 as obsolete.
What it is — dual pre-biased NPN in SOT-363
The Infineon BCR141SH6327XTSA1 is a dual NPN transistor array with integrated bias resistors — each transistor has a 22kΩ base resistor and a 22kΩ base-emitter resistor built in. This eliminates two external resistors per channel, saving board space and reducing component count in digital switching, level shifting, and interface circuits.
Key ratings — what they mean for fit
The 50V collector-emitter breakdown and 100mA maximum collector current cover most low-power switching tasks — driving relays, small solenoids, LED indicators, or logic-level translation up to 50V. The 250mW power limit in the SOT-363 package means you need to watch total dissipation when both transistors are conducting simultaneously; derate per the thermal curve above 25°C ambient. With a transition frequency of 130MHz and a Vce saturation of 300mV at 10mA collector current, this part handles moderate-speed switching cleanly — think 1-10 kHz PWM or data rates up to a few megabits. The pre-biased resistors set the base drive, so the input threshold is well-defined: the transistor turns on when the drive voltage exceeds roughly 0.7V plus the drop across the 22kΩ base resistor.
Package and footprint
Housed in the 6-pin SOT-363 (PG-SOT363-PO), this is a surface-mount package with a 1.25mm body width — a compact footprint that suits dense PCB layouts. The dual-transistor configuration shares the same pinout as many other pre-biased dual NPN parts, which matters if you are looking for a pin-compatible replacement.