749119633

Overview

The Würth Elektronik 749119633 is a surface mount LAN Ethernet transformer belonging to the WE-PoEH series. It features an inductance of 100µH and supports Power over Ethernet (PoE) applications for DC/DC converters and SMPS. The component provides 1500Vrms isolation and operates within a frequency range of 200 to 400kHz. It is designed for board mounting with dimensions of 14mm x 17.65mm x 14.5mm. The unit functions reliably across an operating temperature range from -40°C to 125°C.

Feature Summary

• Integrated magnetic solution supporting Power over Ethernet (PoE) functionality
• High voltage isolation capability of 1500Vrms for safety compliance
• Optimized for high-frequency operation between 200kHz and 400kHz
• Robust thermal performance rated for temperatures up to 125°C

Applications

• Power over Ethernet (PoE) powered devices
• DC/DC converter circuits
• Switching Mode Power Supply (SMPS) designs

Procurement Notes

Verify the specific datasheet revision and package variant when ordering, as manufacturers may update specifications or lead times without notice. Confirm that the surface mount footprint matches your PCB layout requirements. Ensure that the 1500Vrms isolation rating meets your system's safety standards. Cross-reference the 100µH inductance value against your circuit design constraints to guarantee proper transformer behavior under load conditions.

Selection Notes

Choose this component when designing PoE-enabled systems requiring compact surface mount solutions. The WE-PoEH series offers integrated magnetics to reduce board space. Consider the 125°C maximum operating temperature for high-thermal environments. The 1500Vrms isolation is suitable for standard LAN Ethernet isolation requirements. Verify compatibility with 200-400kHz switching frequencies in your power supply topology.

Part Context

This part belongs to Würth Elektronik’s WE-PoEH series, specialized for Power over Ethernet applications. The series focuses on providing integrated magnetic solutions that simplify design processes for networked devices. These components are engineered to meet strict size and performance constraints typical in modern consumer electronics and industrial networking equipment, offering reliable signal integrity and power delivery.

Replacement Considerations

Consult official Würth Elektronik documentation for direct cross-references. No public substitute part numbers are confirmed in the provided source material.