SM91502ALE 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 µH min. to 450 µH max., and supports serial daisy chain and IsoSPI communication protocols. The transformer provides 1000 VDC working voltage with 4300 VDC Hi-Pot rating and operates over a temperature range of -40°C to +125°C. It is AEC-Q200 and RoHS compliant, making it suitable for automotive applications with reference designs compatible with Analog Devices LTC6804-1/6811 and NXP MC33771/33772 battery management ICs.