NDMB152100 is a multi-channel Ethernet transformer module designed to support high-speed data transmission in 1, 2.5, 5, and 10 Gbit/s Ethernet applications. The module features four independent differential pairs (MD1, MD2, MD3, MD4) with integrated common-mode chokes and capacitive coupling networks, providing a 1:1 turn ratio with ±3% tolerance. Key electrical characteristics include insertion loss of -2.0 dB maximum from 1–400 MHz and -3.0 dB maximum from 400–500 MHz, return loss of -22 dB minimum from 1–100 MHz, and crosstalk isolation of -28 dB minimum from 1–100 MHz. The transformer supports a current rating of 960 mA for each of the four differential pairs and provides 1,500 VAC isolation for 60 seconds. This module is ideal for network interface cards, switches, routers, and other high-speed Ethernet equipment requiring reliable signal conditioning and isolation.