7491196501

Overview

The Würth Elektronik 7491196501 is a board-mount power transformer from the WE-PoEH series, designed for high-power Power over Ethernet applications. It features a single primary winding and dual secondary windings with a turns ratio of 1.14:1:1:2. The component supports an input voltage range of 9 V to 57 V and delivers a rated output of 5 V at 3.5 A, providing 35 W of power. Key electrical parameters include an inductance of 128 µH, an isolation voltage of 1500 Vrms, and an operating frequency range of 200 kHz to 400 kHz. It operates within a temperature range of -40°C to +125°C and utilizes SMD/SMT mounting.

Feature Summary

• Supports high-power PoE standards including IEEE 802.3bt Type 4 with 35 W output capability
• Provides robust 1500 Vrms isolation between primary and secondary circuits
• Optimized for high-frequency operation up to 400 kHz for efficient DC/DC conversion
• Features dual secondary windings to support multiphase or redundant power architectures

Applications

• Power sourcing equipment (PSE) for IEEE 802.3bt Type 4 deployments
• High-power midspan injectors for network infrastructure
• DC/DC converter stages in PoE-powered end devices
• Industrial networking switches requiring elevated power budgets

Procurement Notes

Verify the complete part number including any suffixes against the official Wurth Elektronik datasheet to ensure correct packaging and specifications. Confirm that the required RoHS compliance documentation is available for your region. Cross-reference the manufacturer's latest product change notification (PCN) to ensure no recent design updates affect compatibility. Ensure the procurement channel provides genuine components with traceable origin to avoid counterfeit risks.

Selection Notes

Select this component when designing systems requiring high-power PoE delivery exceeding standard 802.3at limits. The dual secondary winding configuration allows for flexible circuit topologies, including interleaved phases to reduce ripple current. Ensure the PCB layout accommodates the specified footprint dimensions of 14 mm x 17.65 mm. Verify that the thermal management strategy supports the 125°C maximum operating temperature rating under full load conditions.

Part Context

This transformer belongs to the WE-PoEH series, which focuses on high-power Ethernet applications. It complements other Wurth PoE transformers by offering higher power density and specific winding configurations for advanced IEEE 802.3bt implementations. The series is engineered to meet stringent efficiency and isolation requirements for modern network hardware.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult the manufacturer directly for qualified alternatives or cross-reference options based on identical electrical parameters and footprint constraints.