B78476A8066A003

Overview

The B78476A8066A003 is a dual-port pulse transformer module designed for 10/100/1000 Base-T Ethernet applications. It supports Power over Ethernet (PoE) functionality, enabling simultaneous data transmission and power delivery over standard twisted-pair cabling. The component utilizes a ferrite toroid core with UL 94 V-0 rated case and potting materials to ensure fire safety and thermal stability. It is engineered for surface-mount technology (SMD) assembly, offering compact integration into network interface cards and switches.

Feature Summary

• Dual-port architecture supporting simultaneous signal processing for two independent Ethernet channels
• Integrated Power over Ethernet (PoE) capability for combined data and power transmission
• Ferrite toroid construction with UL 94 V-0 flame-retardant encapsulation

Applications

• 1000 Base-T network interface controllers
• 10/100 Base-T Ethernet hubs and switches
• Power over Ethernet powered devices (PDs)
• Industrial automation networking equipment

Procurement Notes

Verify the specific ordering code against the manufacturer's official database to confirm compatibility with current production revisions. Ensure that the selected variant matches the required PoE standard and isolation voltage specifications for your target application. Cross-reference the datasheet parameters with your system design requirements before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring integrated magnetics for Gigabit Ethernet interfaces. Consider the SMD package dimensions and thermal performance characteristics during PCB layout planning. Validate that the dual-port configuration aligns with the port density requirements of the end product to optimize board space utilization.

Part Context

This part belongs to the B78476A series of audio and signal transformers manufactured by EPCOS, now part of the TDK Group. The series encompasses various configurations for different frequency ranges and impedance matching needs. This specific model focuses on high-speed digital communication applications within the Ethernet family.

Replacement Considerations

Consult the official TDK/EPCOS substitution guide for verified alternative part numbers. Do not assume cross-compatibility with generic LAN transformers without verifying pinout, electrical parameters, and mechanical footprint alignment.