H1081T

Overview

The H1081T is a LAN pulse transformer module manufactured by Pulse Electronics, designed for 10/100 Base-T applications. It features a surface mount package with dimensions of 25.40mm length, 10.03mm width, and a maximum height of 5.84mm. The component operates within a temperature range of 0°C to 70°C and provides an insulation voltage of 1500 Vrms. The turns ratio is specified as 1:1.41 for the transmitter and 1:1 for the receiver. It meets IEEE 802.3 specifications and is compatible with specific transceivers such as those from AMD and Micrel.

Feature Summary

• Optimized signal integrity and enhanced compatibility for specific transceiver designs
• Compliance with IEEE 802.3 standards for reliable Ethernet transmission
• High potential isolation ensuring electrical safety in network hardware

Applications

• 10/100 BASE-TX datacom transformer modules
• Network interface card (NIC) integration
• Ethernet switch port implementation

Procurement Notes

Verify current availability status as the standard H1081 part number may be obsolete. Confirm RoHS compliance requirements, noting that original versions were non-compliant while newer variants like H1081NLT are compliant. Check for lead time variations between tube and reel packaging options if applicable to your assembly process.

Selection Notes

Select this component for single-port 10/100Mbps Ethernet designs requiring specific transmitter and receiver impedance matching. Ensure the design accommodates the 25.40mm x 10.03mm footprint. Verify thermal management capabilities within the 0°C to 70°C operating range for the intended environment.

Part Context

This component belongs to the LAN Discrete Transformer Modules family from Pulse Electronics. These modules are engineered for high-performance data communication interfaces, providing galvanic isolation and signal conditioning essential for stable Ethernet connectivity in consumer and industrial networking equipment.

Replacement Considerations

The H1081NL is listed as a direct substitute. Verify pinout compatibility and ensure the replacement variant meets the same electrical specifications and mechanical constraints for your PCB layout.