7491192912

Overview

The Würth Elektronik 7491192912 is a Power over Ethernet (PoE) transformer designed for board mounting. It operates within a primary voltage range of 36 V to 57 V and provides a secondary output of 12 V. The component features an inductance of 210 µH and supports a working frequency range from 200 kHz to 500 kHz. It utilizes a surface mount technology (SMD/SMT) installation style with single primary and dual secondary windings. The device is rated for operation between -40°C and +125°C, ensuring reliability in demanding environments.

Feature Summary

• Designed specifically for Power over Ethernet applications supporting DC/DC converter topologies
• Provides high isolation voltage capability for safety compliance
• Optimized for high-frequency switching operations up to 500 kHz
• Constructed for surface mount integration into compact PCB layouts

Applications

• Power over Ethernet (PoE) powered devices
• DC/DC converter input stages
• Switching Mode Power Supply (SMPS) circuits
• Ethernet interface isolation barriers

Procurement Notes

Verify the specific datasheet revision when ordering, as Wurth Elektronik issues Product Change Notifications (PCN) that may update specifications or packaging details. Confirm that the required isolation voltage and inductance values align with your circuit design requirements before finalizing procurement. Ensure compatibility with your chosen PoE controller chipset.

Selection Notes

Select this component when designing systems requiring 36V to 57V input conversion via PoE standards. It is suitable for applications needing robust galvanic isolation and high-frequency performance. Consider the physical dimensions and SMD footprint during layout planning. Verify thermal management capabilities given the operating temperature range extends to +125°C.

Part Context

This part belongs to the WE-PoE series by Würth Elektronik, which focuses on efficient and EMI-compliant power transformers for Ethernet applications. The series is engineered to support various PoE standards and integrates seamlessly with common controller ICs. It represents a specialized solution for converting network cable power into stable DC voltages for electronic equipment.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult official Wurth Elektronik resources or authorized distributors for validated cross-references based on specific electrical and mechanical constraints.