TBU-RS085-300-WH

Overview

The TBU-RS085-300-WH is a highly integrated, fast RS-485 interface protector manufactured by Bourns Inc. It functions as an overvoltage and surge protection IC featuring an internal switch rated at 850V. The device utilizes a 7-DFN package with dimensions of 8x5.5 mm. Designed for board mount applications, it serves as a dual bi-directional TBU device specifically engineered to protect RS-485 data lines from electrical disturbances.

Feature Summary

• Highly integrated design optimized for rapid RS-485 interface protection
• Dual bi-directional functionality ensuring comprehensive signal line safeguarding
• Internal high-voltage switching capability for effective surge suppression

Applications

• Protection of RS-485 data lines
• Surge suppression in industrial communication interfaces
• Overvoltage protection for electronic control systems

Procurement Notes

Verify the specific package variant against official documentation, as sources indicate both 6-DFN and 7-DFN configurations within the TBU-RSxxx-300 series. Confirm that the WH suffix corresponds to the correct reel and tape packaging requirements for automated assembly processes. Ensure compatibility with external overvoltage devices such as GDTs or thyristors if utilized in conjunction with this protector.

Selection Notes

Select this component when designing circuits requiring dedicated protection for RS-485 interfaces. The internal 850V switch rating provides robust defense against transient events. Consider its integration capabilities alongside external protective elements like gas discharge tubes or thyristors to enhance overall system resilience against severe electrical surges.

Part Context

This component belongs to the TBU-RSxxx-300 series, which represents a family of high-speed interface protectors developed by Bourns Inc. These devices are tailored for demanding communication environments where signal integrity and hardware safety are critical. The series emphasizes compact form factors suitable for modern surface-mount technology applications.

Replacement Considerations

Consult official substitution lists for compatible TBU-RS variants. Verify pinout compatibility and voltage ratings before replacing with other models in the TBU-RS series.