749119150

Overview

The Würth Elektronik 749119150 is a board-mount Power Over Ethernet (PoE) transformer from the WE-PoE series. It features a single primary winding and dual secondary windings, designed for high-power applications. The component supports a primary voltage rating of 36 V to 57 V and a secondary voltage rating of 5 V. With a power rating of 35 W and a secondary current rating of 3.5 A, it utilizes an ER11/5 core size. The inductance is specified at 400 uH with a DC resistance of 98 mohm. It operates within a temperature range of -40°C to +125°C at frequencies between 200 kHz and 400 kHz.

Feature Summary

• Provides galvanic isolation for PoE DC/DC converter systems
• Supports high-power transmission up to 35 W
• Designed for surface mount installation

Applications

• Power Over Ethernet midspan injectors
• Power Over Ethernet endspan switches
• PoE-powered device power input stages

Procurement Notes

Verify the specific datasheet version for the 749119150 part number to confirm exact electrical tolerances and pinout configurations. Ensure compatibility with the target PCB footprint and soldering profile. Cross-reference with official Wurth Elektronik documentation to validate RoHS compliance status and operating temperature limits before final integration.

Selection Notes

Select this component when designing systems requiring 35 W PoE power delivery with a 5 V secondary output. The wide primary voltage range accommodates various PoE standards. Consider the 400 uH inductance value for filtering requirements and the 98 mohm resistance for efficiency calculations. Verify that the ER11/5 package dimensions fit the available board space constraints.

Part Context

This component belongs to the Würth Elektronik WE-PoE series, which specializes in transformers for Power Over Ethernet applications. The series offers various power ratings and form factors to support different networking infrastructure needs. Wurth Elektronik manufactures these components to meet strict quality and reliability standards for industrial and commercial electronic systems.

FAQ

What is the primary voltage range for the 749119150?

The primary voltage rating is 36 V to 57 V.

Does this transformer have a single or dual secondary winding?

It features dual secondary windings.