H1126NL

Pulse Transformers Overview

The H1126NL is a single-port LAN transformer module manufactured by Pulse Electronics, designed for surface-mount (SMD/SMT) applications. It supports 100BaseTX Ethernet standards and operates within a frequency range of 1 MHz to 100 MHz. Key electrical specifications include an inductance of 350 uH and an isolation voltage of 1.5 kV. The component functions as a non-PoE signal transformer with unshielded construction. It accommodates a wide operating temperature range from -40°C to +85°C. Physical dimensions are 25.4 mm in length, 9.91 mm in width, and 6.22 mm in height, weighing approximately 3 grams.

Pulse Transformers Feature Summary

• Provides galvanic isolation and signal transformation for 100BaseTX Ethernet interfaces
• Supports high-temperature operation up to 85°C for robust environmental performance
• Features 1.5 kV isolation voltage to ensure safety and signal integrity
• Utilizes SMD/SMT termination for automated PCB assembly integration

Pulse Transformers Applications

• 100BaseTX Ethernet physical layer interface circuits
• Single-port network connectivity modules
• Industrial control systems requiring isolated signal transmission
• Consumer electronics with embedded networking capabilities

Pulse Transformers Procurement Notes

Verify the specific datasheet revision and RoHS compliance status prior to procurement, as manufacturing parameters may evolve. Confirm that the SMD package dimensions align precisely with the target PCB footprint design. Ensure that the thermal management strategy accounts for the specified maximum operating temperature of 85°C during system integration. Cross-reference the isolation voltage requirements against the application's safety standards to guarantee adequate protection levels.

Pulse Transformers Selection Notes

Select the H1126NL when designing for 100BaseTX networks requiring a single-port solution without Power over Ethernet support. This component is suitable for applications needing a compact form factor with standard SMD mounting. Consider the 350 uH inductance value for impedance matching requirements. Evaluate the unshielded nature of the module against potential electromagnetic interference constraints in the final enclosure design.

Pulse Transformers Part Context

This component belongs to the HX series of LAN transformers from Pulse Electronics. It serves as a critical passive element in Ethernet PHY transceivers, facilitating differential signaling conversion. The module integrates primary and secondary windings on a single substrate to minimize board space. It represents a standard solution for legacy and industrial Ethernet deployments where Gigabit speeds are not required.

Pulse Transformers Replacement Considerations

Public confirmed substitute part numbers: None identified.