The 7490140123B is a high-performance 10/100 Base-T Surface-Mount (SMT) LAN transformer designed for industrial and automotive Ethernet applications. With a robust 4.5 kV isolation voltage, compact SMT footprint, and 350 µH inductance for EMI suppression, it delivers reliable signal integrity in harsh environments. This transformer complies with IEEE 802.3 standards, supports a 1:1 turns ratio, and operates efficiently from -40°C to +85°C, making it ideal for switches, routers, PLCs, and IoT systems.

LINK-PP offers a high-quality, fully compatible replacement for this model.
Please contact us to request the datasheet.

Key Features

✔ High-Speed Ethernet – Supports 10/100 Base-T standards (up to 100 Mbps) with 1:1 turns ratio (±5% tolerance) for precise signal coupling.
✔ Robust Isolation – 4.5 kV isolation voltage (1 min, primary to secondary) ensures safety in high-voltage environments.
✔ Industrial Durability – Operates from -40°C to +85°C, ideal for harsh industrial and automotive applications.
✔ Compact SMT Design – Surface-mount package (17.1mm × 14.75mm × 8.65mm).
✔ Integrated EMI Suppression – With 350 µH inductance minimizes signal distortion.
✔ Broad Compatibility – Works with major Ethernet ICs (e.g., Microchip, Texas Instruments) and protocols (EtherCAT, PROFINET).

Key Specifications