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Product Detailed Parameters
- Description：XFMR POE DC/DC CONV 128UH SMD
- Series：WE-PoEH
- 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：9 ~ 57V
- Voltage - Auxiliary：10V
- Voltage - Isolation：1500Vrms
- Inductance @ Frequency：128µH @ 100kHz
- Frequency：200 ~ 400kHz
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Size / Dimension：0.551" L x 0.591" W (14.00mm x 15.00mm)
- Height - Seated (Max)：0.571" (14.50mm)
- Footprint：0.551" L x 0.591" W (14.00mm x 18.10mm)
- Style：-
- Grade：-
- Qualification：-
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Overview
The Würth Elektronik 7491196212 is a Power over Ethernet (PoE) transformer from the WE-PoEH series, designed for high-power applications. It features a surface-mount package with dimensions of 14.00mm x 15.00mm and a maximum height of 14.50mm. The component provides 1500Vrms isolation voltage and operates within a frequency range of 200kHz to 400kHz. Primary voltage ranges from 9V to 57V, while auxiliary voltage is 10V. Inductance is 128µH at 100kHz. Operating temperature spans -40°C to 125°C.
Feature Summary
- Integrated magnetic solution optimized for high-power PoE standards
- High isolation voltage capability for safety compliance
- Surface-mount design for automated assembly processes
Applications
- Power over Ethernet (PoE) systems
- DC/DC converter circuits
- Switching Mode Power Supply (SMPS) transformers
Procurement Notes
Verify the specific ordering suffix against official datasheets to ensure correct packaging and variant selection. Confirm that the 1500Vrms isolation rating meets system safety requirements. Check RoHS3 compliance status for environmental regulations. Ensure the operating temperature range of -40°C to 125°C aligns with thermal management plans. Validate footprint compatibility during PCB layout.
Selection Notes
Select this component when high-power PoE delivery is required alongside galvanic isolation. The 128µH inductance suits frequencies between 200kHz and 400kHz. Consider the 14.00mm x 15.00mm SMD footprint for space-constrained designs. The wide input voltage range supports various DC sources. Ensure the application does not exceed the specified thermal limits.
Part Context
This part belongs to the WE-PoEH series, focusing on high-power Ethernet applications. It integrates magnetics for efficient power transfer. The series supports modern PoE standards requiring robust isolation. Würth Elektronik designs these components for reliability in network infrastructure. The EPQ13 package type defines its physical constraints.
Replacement Considerations
Check for direct substitutes within the WE-PoEH family with compatible pinouts. Verify equivalent inductance and isolation ratings before substitution. Ensure replacement parts match the 14.00mm x 15.00mm footprint. Confirm similar frequency response characteristics.
