H1121NL

Overview

The H1121NL is a single-port surface-mount LAN transformer module designed for 100BaseTX applications. It supports Non-PoE configurations with an inductance of 250uH and primary DC resistance of 0.6 Ohms. The component features a 1:1.414 transmitter and 1:1 receiver turns ratio, providing signal isolation and data interface capabilities.

Feature Summary

• Provides galvanic isolation for Ethernet data signals
• Supports 10/100BASE-TX network standards
• Designed for surface-mount assembly processes

Applications

• Ethernet network interface circuits
• Data communication equipment
• Telecom infrastructure hardware

Procurement Notes

Verify the specific manufacturer datasheet to confirm electrical tolerances and pinout compatibility before integration. Ensure the selected variant matches the required Non-PoE specification and surface-mount package dimensions for the target PCB layout.

Selection Notes

Select this component for designs requiring isolated signal transmission over twisted-pair cabling. Confirm that the 250uH inductance meets the impedance matching requirements of the connected PHY transceiver. Validate thermal performance within the specified operating temperature range.

Part Context

This part belongs to Pulse Electronics' audio and signal transformer portfolio. It serves as a critical passive component in network interface cards and routers, ensuring signal integrity and electrical safety between the physical layer and the cable medium.

Replacement Considerations

Consult official substitution lists for compatible single-port magnetics. Verify that alternative parts maintain identical turns ratios and isolation voltage ratings to ensure protocol compliance.