HM2171HLT

Overview

The HM2171HLT is a surface-mount audio and signal transformer from Pulse Electronics, designed for automotive applications. It belongs to the BMS series and holds AEC-Q200 qualification. The component features an inductance range of 150 µH to 450 µH and supports an insulation voltage of 4300 Vrms. It operates within a temperature range of -40°C to +125°C. The device has two channels and includes shielding. Its physical dimensions are 14.81 mm in length, 11.68 mm in width, and 4.88 mm in height.

Feature Summary

• AEC-Q200 qualified for automotive reliability standards
• High insulation voltage capability of 4300 Vrms
• Shielded construction to minimize electromagnetic interference
• Dual-channel design for battery management systems

Applications

• Automotive Battery Management Systems (BMS)
• Signal isolation in electric vehicle circuits
• Audio signal transformation in automotive infotainment

Procurement Notes

Confirm the specific suffix HLT indicates reel, cut tape, or MouseReel packaging rather than tube. Verify that the required inductance value falls within the specified 150 µH to 450 µH range for the exact part variant. Ensure the application environment stays within the -40°C to +125°C operating temperature limits. Check for RoHS compliance details if restricted substances are a concern. Validate that the 4300 Vrms insulation rating meets the system's safety requirements.

Selection Notes

Select this component when high-voltage isolation is required in space-constrained automotive designs. The dual-channel feature supports balanced signal transmission. The shielded type reduces noise coupling in dense PCB layouts. Consider the surface-mount package for automated assembly processes. Ensure the thermal performance aligns with the maximum junction temperature constraints of the host circuit.

Part Context

This transformer is part of Pulse Electronics' BMS series, targeting electric and hybrid vehicle markets. It complements other components like common mode chokes and power inductors in complete power train solutions. The AEC-Q200 certification ensures consistency with automotive industry quality standards. It serves as a critical interface element for safe communication between high-voltage and low-voltage domains.

Replacement Considerations

The HM2171HL is a related variant, typically differing only in tube packaging compared to the HLT reel/cut tape options. Verify that the electrical parameters remain identical before substitution. Confirm that the mechanical footprint matches the existing PCB layout. Ensure the supplier can provide the required packaging format for production needs.