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Product Detailed Parameters
- Description：XFMR POE DC/DC CONV 42UH 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：-
- Chipset Manufacturer：-
- Voltage - Primary：36 ~ 72V
- Voltage - Auxiliary：11V
- Voltage - Isolation：1500Vrms
- Inductance @ Frequency：42µH @ 100kHz
- Frequency：250 ~ 400kHz
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Size / Dimension：-
- Height - Seated (Max)：0.455" (11.56mm)
- Footprint：0.910" L x 1.145" W (23.11mm x 29.08mm)
- Style：-
- Grade：-
- Qualification：-
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Overview
The Würth Elektronik 749119433 is a surface-mount transformer designed for Power over Ethernet (PoE) applications, specifically serving as a DC/DC converter SMPS transformer. It features a primary voltage rating of 36 to 72V and provides 1500Vrms isolation. The component operates within a frequency range of 250 to 400kHz and offers an inductance of 42µH at 100kHz. It supports a working temperature range from -40°C to +125°C and utilizes a WE-PoE+ series topology.
Feature Summary
- Designed for Power over Ethernet (PoE) systems
- Provides high-voltage isolation for safety
- Optimized for DC/DC converter switching applications
Applications
- Power over Ethernet (PoE) infrastructure
- DC/DC converter circuits
- SMPS transformer implementations
Procurement Notes
Verify the manufacturer part number 749119433 against official Wurth Elektronik documentation to ensure authenticity. Confirm that the specific package type matches surface-mount requirements for your PCB layout. Check for any recent product change notices or datasheet updates regarding electrical characteristics before finalizing procurement specifications.
Selection Notes
Select this component when designing PoE-based power delivery systems requiring robust isolation. Ensure the operating frequency aligns with the 250-400kHz range. Verify that the thermal environment stays within the specified -40°C to +125°C limits. Consider the physical dimensions for adequate spacing on the printed circuit board during the layout phase.
Part Context
This transformer belongs to the WE-PoE+ series by Würth Elektronik, focusing on integrated solutions for Ethernet power delivery. It addresses the need for compact, reliable magnetic components in modern networking hardware. The design emphasizes efficiency and compliance with standard isolation requirements for safe power transmission over data lines.
Replacement Considerations
Consult official Wurth Elektronik cross-reference guides for verified substitutes. Ensure any replacement maintains identical isolation ratings and frequency response characteristics.
