B78476A1889A003

Overview

The B78476A1889A003 is a surface mount LAN pulse transformer manufactured by TDK. It features a 1CT:1CT turns ratio and an inductance of 350µH, designed for 10/100/1000 Base-T applications. The component measures 13.64mm in length, 11.94mm in width, and has a maximum seated height of 6.47mm. It operates within a temperature range of -40°C to +85°C and complies with RoHS 3 standards.

Feature Summary

• Surface mount construction optimized for dense PCB layouts
• Integrated magnetic module design for LAN signal transmission
• Compliance with RoHS 3 environmental regulations

Applications

• 10/100/1000 Base-T network interface circuits
• LAN signal isolation and impedance matching
• Ethernet port protection modules

Procurement Notes

Verify the specific ordering suffix to confirm exact electrical tolerances and packaging configuration. Ensure compatibility with automated pick-and-place equipment regarding the specified package dimensions. Confirm that the selected variant meets the required thermal management specifications for the target operating environment.

Selection Notes

Select this component based on the requirement for a compact 13.64mm x 11.94mm footprint suitable for space-constrained designs. The 350µH inductance value must align with the specific impedance matching requirements of the Ethernet PHY transceiver. Verify that the -40°C to +85°C operating range satisfies the environmental conditions of the final assembly.

Part Context

This part belongs to the B78476A series of magnetics modules specifically engineered for LAN applications. The series provides integrated solutions for signal coupling and isolation in Ethernet interfaces. TDK manufactures these components to support high-density networking hardware requiring reliable signal integrity across varying industrial temperatures.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.