749119218

$5.41

Description：XFMR POE DC/DC CONV 210UH SMD
Series：WE-PoE
Mfr：Würth Elektronik
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:3fd63028d7db Category: Switching Converter, SMPS Transformers Brand: Würth Elektronik

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Product introduction

Product Detailed Parameters

Description：XFMR POE DC/DC CONV 210UH SMD
Series：WE-PoE
Mfr：Würth Elektronik
Package：Tape & Reel (TR),Cut Tape (CT)
Type：For DC/DC Converters
Applications：Power Over Ethernet (PoE)
Intended Chipset：LM5070, LM5071, LM5072, LTC4267, TPS23750, TPS23770
Chipset Manufacturer：Linear Technology, Texas Instruments
Voltage - Primary：36 ~ 57V
Voltage - Auxiliary：-
Voltage - Isolation：1.5kVAC
Inductance @ Frequency：210µH @ 100kHz
Frequency：200 ~ 500kHz
Operating Temperature：-40°C ~ 125°C
Mounting Type：Surface Mount
Size / Dimension：0.642" L x 0.472" W (16.30mm x 12.00mm)
Height - Seated (Max)：0.291" (7.40mm)
Footprint：0.709" L x 0.642" W (18.00mm x 16.30mm)
Style：-
Grade：-
Qualification：-

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749119218

Overview

The Würth Elektronik 749119218 is a Power Over Ethernet (PoE) board-mount transformer designed for DC/DC converter applications. It features an ER14.5/6 core size with a primary voltage rating of 36 V to 57 V and a secondary voltage rating of 1.8 V. The component has an inductance of 21 uH and a DC resistance of 640 mohm. It provides 1.5 kVAC isolation and supports switching frequencies between 200 kHz and 500 kHz. The device utilizes surface mount technology for PCB integration.

Feature Summary

Provides galvanic isolation for PoE power transfer systems
Optimized for high-frequency switching converter operation
Designed for compact surface mount PCB assembly

Applications

Power over Ethernet (PoE) powered devices
DC/DC converter modules
Industrial communication equipment
Automotive electronics systems

Procurement Notes

Verify the specific datasheet version and RoHS compliance status directly from the manufacturer before procurement. Confirm that the 36-57 V primary range aligns with your system's input requirements. Ensure the 1.8 V secondary output matches the downstream regulator design. Cross-reference the package dimensions against your PCB footprint library to guarantee mechanical compatibility during assembly.

Selection Notes

Select this component when designing PoE interfaces requiring 1.5 kVAC isolation and operation within the 200-500 kHz frequency band. The ER14.5/6 form factor suits space-constrained layouts. Validate thermal performance under maximum load conditions, as the 640 mohm resistance impacts efficiency. Ensure the 1.8 V secondary rail is compatible with the target controller's input specifications.

Part Context

This part belongs to Würth Elektronik's WE-PoE series, which specializes in integrated magnetic solutions for Ethernet-powered applications. The series addresses the growing demand for reliable power delivery over data cables in industrial and automotive sectors. These transformers combine magnetics and circuitry to simplify design and reduce electromagnetic interference risks in modern electronic systems.