SM91502ALA-E is an automotive-grade BMS transformer with integrated common mode choke designed for battery management system communication interfaces. It features a 1:1 turns ratio with ±2% tolerance, open circuit inductance of 150–450 µH, and working voltage of 1000 VDC with Hi-Pot rating of 4300 VDC. The transformer provides excellent common mode rejection ratio of -35 dB minimum from 1–100 MHz and operates over a wide temperature range of -40°C to +125°C. Developed for use with Analog Devices LTC6804-1/681X, NXP MC33771/33772, and Texas Instruments BQ79616 battery management ICs, this AEC-Q200 compliant component is ideal for automotive battery management applications requiring reliable isolated communication.