749014010

Pulse Transformers Overview

The Würth Elektronik 749014010 is a WE-LAN series LAN pulse transformer designed for surface mount applications. It supports 10/100 Base-T Ethernet speeds with a 1:1 turns ratio and four channels. The component features an inductance of 350 µH, primary and secondary coil resistances of 900 mOhms each, and an insulation voltage of 4.5 kVAC. Operating within a frequency range of 1 MHz to 100 MHz, it is housed in a shielded SMD package measuring 17.1 mm x 15.34 mm x 8.4 mm. The unit functions reliably between 0°C and +70°C.

Pulse Transformers Feature Summary

• Integrated shielding reduces electromagnetic interference for stable signal transmission
• Designed for compatibility with major Ethernet controller ICs
• Supports standard 10/100 Base-T network protocols

Pulse Transformers Applications

• 10/100 Base-T Ethernet interface circuits
• LAN port isolation and impedance matching
• Network adapter hardware design

Pulse Transformers Procurement Notes

Verify the specific datasheet version when sourcing this component to ensure compliance with current manufacturing standards. Confirm that the surface mount footprint matches the specified dimensions of 17.1 mm by 15.34 mm during PCB layout validation. Check RoHS status documentation for environmental compliance requirements prior to final procurement approval.

Pulse Transformers Selection Notes

Select this transformer for designs requiring integrated shielding and high insulation voltage capabilities. Ensure the operating temperature range of 0°C to +70°C aligns with the target environment. Verify that the 900 mOhms coil resistance meets the power loss constraints of the specific Ethernet PHY implementation being utilized.

Pulse Transformers Part Context

This component belongs to the WE-LAN family from Würth Elektronik, which specializes in magnetics for data communication interfaces. The 749014010 serves as a passive isolation element within Ethernet physical layer circuits, providing galvanic separation between the transceiver and the external cable jack while maintaining signal integrity across the required frequency spectrum.

Pulse Transformers Replacement Considerations

No public substitute part numbers are confirmed in the provided source material.