750315422

Overview

The Würth Elektronik 750315422 is a surface-mount transformer designed for Power over Ethernet (PoE) applications within DC/DC converter circuits. It belongs to the MID-POELT series and features an inductance of 9.07µH measured at 10kHz. The component supports a primary voltage range of 9V to 57V and provides 1875Vrms isolation between windings. Operating frequencies are specified at 250kHz, with a recommended controller chip from Linear Technology, specifically the LT4295. The unit functions reliably across a temperature range of -40°C to +125°C.

Feature Summary

• Engineered specifically for Power over Ethernet (PoE) topologies
• Provides high-voltage isolation for safe DC/DC conversion
• Optimized for use with dedicated PoE controller ICs

Applications

• Power over Ethernet (PoE) powered devices
• DC/DC converter modules
• Switching Mode Power Supply (SMPS) designs

Procurement Notes

Verify the specific datasheet revision when ordering, as manufacturing updates may occur. Confirm that the target design utilizes the LT4295 controller or a compatible alternative, as this transformer is tuned for specific switching characteristics. Ensure PCB footprint compatibility with the surface-mount package dimensions before finalizing procurement.

Selection Notes

Select this component for designs requiring integrated PoE isolation and step-down conversion capabilities. The 9.07µH inductance value is critical for matching the timing requirements of the LT4295 controller. Consider the 1875Vrms isolation rating for safety compliance in networked equipment. This part is suitable for space-constrained applications due to its surface-mount form factor.

Part Context

This transformer is part of Würth Elektronik's MID-POELT series, which focuses on compact solutions for Power over Ethernet infrastructure. The series supports various PoE standards by offering tailored magnetic components that integrate seamlessly with industry-standard controllers. It represents a specialized subset of the manufacturer's broader SMPS transformer portfolio.

Replacement Considerations

Direct substitutes must match the 9.07µH inductance, 1875Vrms isolation, and SMD package. Verify compatibility with the LT4295 controller if replacing in existing designs. Cross-reference pinout and thermal characteristics to ensure equivalent performance in the target application.