H1259NLT

Overview

The H1259NLT is a single-channel LAN transformer module manufactured by Pulse Electronics, designed for surface-mount technology (SMD/SMT) applications. It supports 100BaseTX Ethernet standards and operates within a frequency range of 100 kHz to 100 MHz. Key electrical parameters include an inductance of 350 uH, a secondary coil impedance of 0.65 Ohms, and an isolation voltage rating of 1.5 kV. The component is unshielded and features a non-PoE configuration. Its physical dimensions are 12.7 mm in length, 9.65 mm in width, and 6 mm in height. The unit weight is specified as 2.850 g.

Feature Summary

• Provides galvanic isolation for 100BaseTX network interfaces
• Supports high-frequency signal transmission up to 100 MHz
• Features robust insulation voltage capability for data integrity

Applications

• 100BaseTX Ethernet port implementation
• Network interface card (NIC) design
• Data communication equipment requiring signal isolation

Procurement Notes

Verify the specific manufacturer part number against official datasheets to ensure compatibility with target circuit designs. Confirm that the SMD package dimensions align with PCB footprint requirements. Check RoHS compliance status through authorized distributors or direct manufacturer channels prior to ordering. Ensure storage conditions meet the specified temperature ranges to maintain component integrity during supply chain transit.

Selection Notes

Select this component for applications requiring 100BaseTX connectivity with non-PoE constraints. Consider the 1.5 kV isolation rating when designing for safety-critical network segments. Evaluate the 350 uH inductance value against system noise immunity requirements. Verify that the unshielded nature of the module does not conflict with electromagnetic interference (EMI) regulations applicable to the final product enclosure.

Part Context

This component belongs to the audio and signal transformers category within Pulse Electronics' portfolio. It serves as a critical interface element between Ethernet PHY chips and external cabling. The module integrates magnetic components necessary for signal coupling and common-mode noise rejection in standard twisted-pair network environments.

Replacement Considerations

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