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Product Detailed Parameters
- Description：XFMR POE DC/DC CONV 120UH 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：1500Vrms
- Inductance @ Frequency：120µH @ 100kHz
- Frequency：200 ~ 500kHz
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Size / Dimension：0.689" L x 0.630" W (17.50mm x 16.00mm)
- Height - Seated (Max)：0.327" (8.30mm)
- Footprint：0.689" L x 0.935" W (17.50mm x 23.74mm)
- Style：-
- Grade：-
- Qualification：-
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Overview
The Würth Elektronik 749119350 is a surface-mount flyback transformer designed for Power-over-Ethernet (PoE) Powered Devices. It features a primary voltage range of 36V to 57V and operates at switching frequencies between 200kHz and 500kHz. The component provides 1500Vrms isolation and has an inductance of 120µH measured at 100kHz. It supports chipsets including LM5070, LM5071, LTC4267, and TPS23750. The unit measures 17.50mm x 16.00mm with a maximum height of 8.30mm and functions within a temperature range of -40°C to 125°C.
Feature Summary
- Designed specifically for PoE Powered Device applications
- Provides high-voltage isolation for safety compliance
- Optimized for compatibility with major PoE controller ICs
Applications
- Power-over-Ethernet Powered Devices
- DC/DC Converter SMPS Transformers
- Network Interface Circuitry
Procurement Notes
Verify the specific manufacturer part number against official datasheets to ensure correct specifications. Confirm that the required input voltage range and switching frequency align with your design parameters. Check for RoHS compliance status and moisture sensitivity levels relevant to your assembly process. Ensure the package type matches your PCB footprint requirements.
Selection Notes
Select this component when designing PoE PDs requiring a 36V to 57V input range. It is suitable for designs utilizing controllers like the LM5070 or LTC4267 families. Consider the 120µH inductance value and 200-500kHz operating frequency for your magnetic design. Verify thermal performance within the -40°C to 125°C range for your environment.
Part Context
This component belongs to the WE-PoE series from Würth Elektronik, which offers various transformers tailored for Ethernet power applications. The series includes different inductance values and output configurations to support diverse PoE standards and power levels. This specific model targets mid-power applications with its defined electrical characteristics.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Consult the manufacturer's selection guide for alternative models within the WE-PoE series that match your specific voltage and power requirements.
