TBU-CA040-500-WH

Overview

The Bourns TBU-CA040-500-WH is a board-mounted bidirectional surge protector belonging to the TBU-CA series of High-Speed Protectors (HSP). It functions as a silicon-based solid-state current limiter designed to block transient currents and provide voltage isolation. The device features a DFN surface-mount package with SMD/SMT termination. Key electrical ratings include a maximum voltage rating of 400 V and a continuous current rating of 1 A. It operates within a temperature range of -55 °C to +125 °C.

Feature Summary

• Provides bidirectional surge protection against lightning, power induction, and ground potential rise events.
• Acts as a solid-state resettable barrier that blocks transient current while maintaining voltage isolation.
• Designed for high-speed response to protect sensitive electronics from catastrophic circuit damage.

Applications

• Protection against lightning-induced surges in electronic circuits.
• Mitigation of power induction and cross-power events.
• Defense against ground potential rise (EPR) conditions.
• General circuit protection against energy surge conditions.

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and UL certification details prior to integration. Ensure the specific suffix matches design requirements. Check regional availability constraints as distribution may vary by location.

Selection Notes

Select this component when bidirectional protection is required for systems exposed to high-energy transients. The 400 V rating suits higher voltage applications compared to lower-rated variants. The 1 A current limit defines the operational boundary for continuous load versus fault blocking. Consider the DFN package for space-constrained PCB layouts requiring surface mount technology.

Part Context

This part belongs to the Bourns TBU-CA series of High-Speed Protectors. This family includes multiple pulse voltage and trigger current variations. The CA series specifically offers five distinct pulse voltage options and five trigger current configurations to address diverse surge protection needs across industrial and commercial applications.

Replacement Considerations

Consult official Bourns documentation for qualified substitute part numbers within the TBU-CA series. Verify compatibility regarding voltage ratings, current limits, and package dimensions before substitution.

FAQ

What type of protection does the TBU-CA040-500-WH provide?

It provides bidirectional surge protection against events such as lightning, power induction, and ground potential rise.

Is the TBU-CA040-500-WH a resettable device?

Yes, it is a silicon-based solid-state resettable current limiter.