The HX1224CNL is a single-port, surface-mount transformer module that meets IEEE 802.3 specifications for 100BASE-T Ethernet. It provides high input-to-output isolation of 4000 VRMS for one minute and features a precise 1:1 turns ratio. Key electrical characteristics include a minimum Open Circuit Inductance (OCL) of 350 µH with an 8mA DC bias and a low insertion loss of -1.0 dB maximum from 1 to 80 MHz. Operating over a wide temperature range of -40°C to +85°C, this RoHS-compliant module is ideal for applications requiring robust signal integrity and high isolation, such as network interface cards, hubs, and routers.