TBU-CA025-500-WH

Overview

The Bourns TBU-CA025-500-WH is a bidirectional transient current limiter (TBU) in a DFN package. It features a maximum reverse standoff voltage of 20V and a clamping voltage of 250V. The device handles a peak pulse current of 1A with a working temperature range from -55°C to +125°C. Dimensions are 6.5mm x 4mm x 0.85mm.

Feature Summary

• Provides simultaneous overcurrent and overvoltage protection through solid-state resettable technology.
• Acts as a series barrier to block transient currents and provide voltage isolation during surge events.

Applications

• Voice and VDSL card protection
• Ethernet port protection
• RS-485 and RS-422 circuit protection

Procurement Notes

Verify the specific suffix WH against the manufacturer datasheet to confirm packaging and tape specifications. Ensure the component meets UL compliance requirements for your target market. Confirm that the DFN footprint matches your PCB design constraints before finalizing procurement orders.

Selection Notes

Select this component when bidirectional protection is required for low-voltage data lines. The 20V standoff voltage suits applications operating near this threshold. The 1A current rating defines the maximum sustainable load before tripping. Verify that the 250V clamping level adequately protects downstream sensitive electronics.

Part Context

This part belongs to the Bourns TBU-CA series, designed for board-mount surge suppression. It utilizes silicon-based solid-state technology to replace traditional fuses or gas discharge tubes. The series offers various voltage ratings within the same physical footprint for design flexibility.

Replacement Considerations

Check for TBU-CA-Q variants if automotive AEC-Q101 qualification is required. Other TBU-CA models with different voltage ratings may serve as functional substitutes if electrical parameters align with the circuit design.

FAQ

Is the TBU-CA025-500-WH a fuse?

No, it is a solid-state resettable transient current limiter that automatically recovers after a fault condition clears.

What is the maximum operating temperature?

The maximum operating temperature is +125°C.