BAR43CFILM is a 2A sub-miniature P-channel MOSFET power switch by STMicroelectronics. It is designed with a very small package, measuring just 2 x 1.2 mm, making it ideal for use in space-constrained applications. It features low on resistance, low input current, and low output current drive capability, allowing for improved power efficiency in power management applications. The device is designed for use in a wide variety of power control applications, including DC to DC converters, battery chargers and protection circuits.