TBU-CA040-300-WH

Overview

The Bourns TBU-CA040-300-WH is a board-mounted surge protector belonging to the TBU-CA series of High-Speed Protectors (HSP). It functions as a bidirectional silicon-based solid-state current limiter designed to block transient currents and provide voltage isolation. The device operates within a temperature range of -55°C to +125°C and utilizes an SMD/SMT DFN package for surface mount integration.

Feature Summary

• Bidirectional protection capability for circuit isolation
• Solid-state silicon construction for resettable operation
• High-speed response to transient energy events

Applications

• Protection against lightning-induced surges
• Defense against power line cross conditions
• Mitigation of ground potential rise (EPR) events

Procurement Notes

Verify the specific datasheet for the TBU-CA040-300-WH variant, as official documentation may be limited compared to other series members like the 500 or 100 models. Confirm RoHS compliance status and UL certification details directly from the manufacturer's technical library before finalizing procurement specifications.

Selection Notes

Select this component when bidirectional surge protection is required for sensitive electronics exposed to external transient threats. Ensure the application environment remains within the specified -55°C to +125°C operating temperature range. Verify that the DFN package footprint aligns with the PCB layout constraints.

Part Context

This part belongs to the Bourns TBU-CA series, which features five pulse voltages and five trigger currents. The TBU-HSP technology serves as an effective barrier in series with the load, distinguishing it from standard TVS diodes by actively limiting current rather than just clamping voltage.

Replacement Considerations

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