The SM453229-381N7Y is a 10/100/1000 Base-T chip LAN transformer compliant with IEEE 802.3 Ethernet standards. It provides a minimum open circuit inductance of 380 μH and maintains 350 μH with an 8 mA DC bias. Key electrical characteristics include a 1:1 turns ratio, a maximum insertion loss of -1.5 dB from 1-100 MHz, and a Hi-Pot isolation rating of 1500 VAC. Designed as a discrete component for flexible PCB layouts, it operates over an expanded temperature range of -40 to +85 °C, making it suitable for robust networking hardware.