7491195212

Overview

The Würth Elektronik 7491195212 is a high-power Power over Ethernet (PoE) transformer designed for surface mount applications. It features an inductance of 21µH and supports power levels up to 24W, making it suitable for PoE+ powered devices. The component provides 1500Vrms isolation between primary and secondary windings. Operating frequencies range from 200kHz to 400kHz. It is engineered for use in DC/DC converters and switch-mode power supplies within telecom and networking infrastructure.

Feature Summary

• High power capability supporting up to 24W output
• Integrated magnetic design for compact PCB layouts
• 1500Vrms electrical isolation for safety compliance
• Optimized for flyback topology in PoE applications

Applications

• PoE+ powered end-point devices
• Telecommunications equipment
• WLAN access points
• Safety cameras

Procurement Notes

Verify the specific datasheet revision when ordering, as manufacturers may update specifications or pinouts through Product Change Notices. Confirm that the surface mount package dimensions match the target PCB footprint exactly. Ensure the selected component meets the required isolation voltage standards for the intended market certification. Cross-reference the manufacturer part number with authorized distributors to ensure authenticity and traceability.

Selection Notes

Select this component when designing systems requiring high power delivery over Ethernet cables, specifically for PoE+ standards. The 21µH inductance value must align with the switching frequency requirements of the chosen controller IC. Consider the thermal performance of the board layout, as high-power transformers generate heat. Verify compatibility with the specific flyback converter architecture planned for the power supply stage.

Part Context

This part belongs to the WE-PoEH series, which focuses on high-power Ethernet solutions. It complements standard PoE transformers by offering increased power handling capabilities. The series is designed to meet the demands of modern networking devices that require more than standard IEEE 802.3af/at power limits. It integrates magnetics into a single surface-mount package to simplify assembly.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.