749119550

Overview

The Würth Elektronik 749119550 is a surface-mount Power over Ethernet (PoE) transformer designed for DC/DC converter applications within the WE-PoE series. It features two output ports and operates at frequencies between 200 kHz and 400 kHz. The component provides 1500 Vrms isolation and has an inductance of 48 µH. Its physical dimensions are 14 mm in length, 17.65 mm in width, and 14.5 mm in height. It supports a wide operating temperature range from -40°C to +125°C.

Feature Summary

• Integrated magnetic solution for PoE power delivery systems
• High isolation voltage rating for safety compliance
• Optimized for high-frequency switching operations
• Compact surface-mount footprint for space-constrained designs

Applications

• Power over Ethernet (PoE) powered devices
• DC/DC converter input stages
• Industrial communication equipment
• Automotive networking modules

Procurement Notes

Verify the specific datasheet revision before ordering, as design improvements may affect mechanical or electrical parameters. Confirm that the application environment does not exceed the specified thermal limits. Ensure PCB layout accommodates the exact package dimensions to prevent soldering defects. Cross-reference with authorized distributors to guarantee authenticity and traceability.

Selection Notes

Select this component when designing PoE interfaces requiring robust isolation and high-temperature stability. It is suitable for applications utilizing compatible controller chips such as LM5070 or TPS23750 families. Evaluate the 48 µH inductance value against system ripple current requirements. Consider the surface-mount orientation for automated assembly processes.

Part Context

This part belongs to the Würth Elektronik WE-PoE series, which focuses on efficient and EMI-compliant power delivery solutions. The series supports various PoE standards and integrates magnetics with control logic compatibility. It addresses the need for compact, reliable power conversion in modern networked electronic systems.

Replacement Considerations

Check for direct substitutes within the WE-PoE family that match the 48 µH inductance and 1500 Vrms isolation. Verify pinout compatibility if replacing with other manufacturers' PoE transformers. Ensure the alternative component supports the same 200–400 kHz operating frequency range.