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Product Detailed Parameters
- Description：XFMR POE DC/DC CONV 127UH 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：-
- Voltage - Primary：34 ~ 72V
- Voltage - Auxiliary：12V @ 15mA
- Voltage - Isolation：1500Vrms
- Inductance @ Frequency：127µH @ 100kHz
- Frequency：-
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Size / Dimension：0.530" L x 0.591" W (13.46mm x 15.00mm)
- Height - Seated (Max)：0.500" (12.70mm)
- Footprint：0.530" L x 0.713" W (13.46mm x 18.10mm)
- Style：-
- Grade：-
- Qualification：-
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Overview
The Würth Elektronik 7491199501 is a Power over Ethernet (PoE) transformer designed for board mounting. It features a primary voltage rating of 34 to 72 V and a secondary voltage of 5 V. The component provides 1500Vrms isolation and has an inductance of 127µH at 100kHz. Its physical dimensions are 13.46mm length, 18.10mm width, and 12.70mm height maximum. It operates within a temperature range of -40°C to 125°C.
Feature Summary
- Designed specifically for Power over Ethernet applications supporting DC/DC converters and SMPS topologies.
- Provides high-voltage isolation capability suitable for network interface protection.
- Engineered for surface mount technology integration into compact electronic assemblies.
Applications
- Power over Ethernet (PoE) powered devices
- DC/DC converter input stages
- Switching Mode Power Supply (SMPS) designs
Procurement Notes
Verify the specific datasheet revision when ordering, as correction notices have been issued for this series. Confirm that the required chipsets such as LM5070 or TPS23750 are compatible with the transformer's electrical characteristics. Ensure the design tool Red Expert is utilized for accurate simulation prior to final procurement decisions.
Selection Notes
Select this component for PoE implementations requiring 127µH primary inductance and 1500Vrms isolation. It is suitable for designs utilizing specified controller chips like LTC4267 or TP523770. Consider the ER13 package size constraints and the operating temperature range when evaluating thermal management requirements for the target application environment.
Part Context
This part belongs to the WE-PoE series from Würth Elektronik, which focuses on power delivery over Ethernet networks. The series includes various transformers optimized for different power levels and form factors. This specific model targets mid-power applications requiring robust isolation and compatibility with common PoE controller ICs.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult the manufacturer's official selection guide or use the Red Expert tool to identify equivalent components within the WE-PoE portfolio based on specific circuit requirements.
