7490120110

Pulse Transformers Overview

The Würth Elektronik 7490120110 is a surface-mount LAN pulse transformer designed for 10/100 Base-T Ethernet applications. It features a single output configuration with a 1:1 turns ratio and an inductance of 120µH. The component operates within a frequency range of 1MHz to 100MHz and supports an isolation voltage of 1500Vrms. It complies with IEEE 802.3at standards and UL94-V0 flammability ratings. The physical dimensions are 12.7mm in length and 9.27mm in width, suitable for compact PCB layouts.

Pulse Transformers Feature Summary

• Integrated magnetic design optimized for 10/100 Base-T Ethernet signal integrity
• Surface-mount construction facilitates automated assembly processes
• High isolation voltage capability ensures electrical safety between circuits

Pulse Transformers Applications

• Ethernet network interface cards
• Industrial communication modules
• Consumer electronic networking devices

Pulse Transformers Procurement Notes

Verify the specific manufacturer part number against official Wurth Elektronik documentation to ensure authenticity. Confirm that the received components match the specified package dimensions and pinout configuration. Check for any recent product change notices regarding material composition or manufacturing location updates prior to final integration.

Pulse Transformers Selection Notes

Select this component when a single-channel LAN transformer is required for 10/100 Base-T systems. Ensure the design accommodates the 12.7mm x 9.27mm footprint and the -40°C to 85°C operating temperature range. Consider the 1500Vrms isolation requirement if galvanic separation is necessary between the PHY and the transformer primary side.

Pulse Transformers Part Context

This part belongs to the WE-LAN series of magnetics from Wurth Elektronik. The series provides integrated solutions for Ethernet connectivity, combining transformers and common mode chokes in compact packages. These components are engineered to meet stringent electromagnetic compatibility requirements for modern digital interfaces.

Pulse Transformers Replacement Considerations

Consult official Wurth Elektronik cross-reference lists for verified substitutes. Do not assume functional equivalence with generic LAN transformers without verifying electrical parameters and pin configurations.