B78476A7694A003

Overview

The B78476A7694A003 is a LAN transformer from the EPCOS B78476A series, designed for signal and audio applications. It features SMD/SMT termination style with an isolation voltage of 1.5 kV. The component operates within a frequency range of 100 kHz to 100 MHz and supports primary and secondary coil impedances of 1 Ohm. It functions in dual, quad, or single channel configurations across temperatures from -40°C to +85°C. Dimensions vary by variant, with lengths up to 28.1 mm, widths up to 15.2 mm, and heights up to 8.41 mm.

Feature Summary

• Provides galvanic isolation for LAN signal transmission
• Supports surface mount device integration
• Operates across wide industrial temperature ranges

Applications

• 10/100 Base-T network interfaces
• 1000 Base-T Gigabit Ethernet connections
• Power over Ethernet (PoE) systems

Procurement Notes

Verify the specific package type and pin configuration against the official datasheet before ordering. Confirm that the isolation voltage rating meets system safety requirements. Ensure the operating temperature range aligns with the intended environmental conditions. Check for any specific RoHS compliance documentation if required by your manufacturing standards.

Selection Notes

Select this component based on the required channel count and impedance matching for the specific LAN standard. Consider the physical dimensions to ensure compatibility with the PCB layout constraints. Verify the termination style matches the assembly process capabilities. Evaluate the thermal performance to guarantee reliable operation under maximum load conditions.

Part Context

This part belongs to the B78476A series of magnetics modules for LAN applications manufactured by EPCOS, now part of TDK Electronics. These components are engineered for high reliability in network infrastructure equipment. The series offers various configurations to support different Ethernet standards and power delivery requirements.

Replacement Considerations

Consult the official EPCOS/TDK replacement guide for direct substitutes. Verify electrical parameters such as impedance and isolation voltage match exactly. Ensure mechanical dimensions and pinout compatibility for seamless integration into existing designs.