TBU-CA085-200-WH

Overview

The Bourns TBU-CA085-200-WH is a board-level surge suppressor featuring a bidirectional TBU device. It operates with a voltage rating of 850 V and a current rating of 400 mA. The component supports a minimum operating temperature of -55°C and a maximum operating temperature of +125°C. It utilizes an SMD/SMT termination type within a DFN package. The device provides overcurrent and overvoltage protection, complying with UL standards and RoHS directives.

Feature Summary

• Provides integrated overcurrent and overvoltage protection for sensitive circuitry
• Features bidirectional functionality for versatile signal line protection
• Designed as a board-level surge suppressor for compact integration

Applications

• Voice communication circuits
• VoIP slicer applications

Procurement Notes

Verify the specific datasheet version and compliance documentation directly from Bourns official channels before procurement. Confirm that the DFN package dimensions and thermal characteristics align with your PCB layout requirements. Ensure that the 850 V voltage rating and 400 mA current handling capabilities meet the specific electrical stress conditions of your target application environment to guarantee reliable long-term operation.

Selection Notes

Select this component when bidirectional protection is required for low-voltage signal lines exposed to transient surges. The high voltage rating of 850 V allows it to handle significant energy spikes while maintaining a small footprint. Consider the wide operating temperature range if the device will be deployed in harsh industrial or outdoor environments where thermal stability is critical for consistent performance.

Part Context

This part belongs to the TBU (Transient Break-Over Unit) series by Bourns, which specializes in board-level surge suppression. These devices are engineered to protect telecommunications and data lines from high-energy transients. The CA variant specifically denotes a bidirectional configuration suitable for protecting differential or single-ended lines against both positive and negative voltage spikes.

Replacement Considerations

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