TBU-DF085-500-WH

Overview

The TBU-DF085-500-WH is a dual bi-directional transient voltage surge suppressor from Bourns. It features an internal switch technology designed for board mount applications. The device has a maximum clamping voltage of 850V and supports a peak pulse current of 500mA. It operates within a temperature range of -55°C to +125°C. The component is housed in a 6-TDFN surface-mount package, providing protection against overcurrent and overvoltage events in electronic circuits.

Feature Summary

• Dual circuit configuration for comprehensive surge suppression
• Internal switch technology for high-speed protection response
• Bi-directional capability for versatile signal line protection

Applications

• General purpose surge suppression
• Protection of sensitive electronic components
• Overcurrent and overvoltage safeguarding in PCB designs

Procurement Notes

Verify the specific datasheet version when sourcing, as specifications may be updated by the manufacturer. Confirm that the 6-TDFN footprint matches your PCB design requirements. Ensure compatibility with reflow soldering processes specified in the official documentation. Cross-reference the part number suffix to confirm the exact variant intended for your application.

Selection Notes

Select this component when dual-channel protection is required on a single footprint. Consider the 850V clamping limit for appropriate voltage margin. Evaluate the 500mA peak pulse current rating against expected surge levels. The DFN package suits space-constrained designs requiring surface-mount assembly.

Part Context

This part belongs to Bourns' TBU (Transient Break-Unit) family, which utilizes proprietary internal switch technology. Unlike standard TVS diodes, TBUs offer resettable protection characteristics. The DF series indicates a dual-channel configuration within the product line, designed for robust surge immunity in compact form factors.

Replacement Considerations

Direct substitutes include other dual bi-directional TBU devices from Bourns with similar voltage and current ratings. Verify pinout compatibility before replacing. Alternative manufacturers may offer comparable surge protectors, but internal switch technology differences require careful evaluation.