TBU-CA040-050-WH

Overview

The Bourns TBU-CA040-050-WH is a board-mounted, bidirectional Transient Break-Up (TBU) high-speed protector designed for circuit protection. It features a voltage rating of 400 V and a current rating of 1 A. The component operates within a temperature range of -55°C to +125°C. It utilizes an SMD/SMT termination type and is housed in a DFN package. The device is RoHS compliant and UL certified.

Feature Summary

• Provides bidirectional transient surge protection for sensitive electronic circuits.
• Functions as a high-speed protector to mitigate overvoltage and overcurrent events.
• Designed for board-mounted installation using surface mount technology.

Applications

• Protection of RS-485 communication interfaces
• Protection of RS-422 communication interfaces
• General circuit protection against electrostatic discharge and lightning-induced surges

Procurement Notes

Verify the specific part number suffix against official manufacturer documentation to ensure correct configuration. Confirm that the selected variant matches the required voltage and current ratings for the target application. Check for any recent product change notifications regarding manufacturing sites or marking changes. Ensure compliance with regional regulatory standards such as RoHS and UL requirements before finalizing procurement decisions.

Selection Notes

Select this component based on its 400 V voltage rating and 1 A current handling capability. Consider the DFN package size for space-constrained designs requiring surface mount integration. Evaluate the operating temperature range of -55°C to +125°C against environmental conditions. Ensure the bidirectional protection characteristic aligns with the signal polarity requirements of the protected circuit lines.

Part Context

This component belongs to the Bourns TBU® High-Speed Protector family, which offers comprehensive overvoltage and overcurrent protection solutions. The TBU series is engineered to protect circuits from catastrophic transient events while maintaining signal integrity. This specific model represents a board-mounted solution suitable for various industrial and commercial applications requiring robust surge suppression.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source data. Consult official Bourns documentation for potential cross-reference options or updated series replacements.