TBU-DF085-300-WH

Overview

The Bourns TBU-DF085-300-WH is a dual-channel high-speed protection device (HSP) designed for circuit protection against short circuits, overvoltage transients, and battery cell failures. It features a MOSFET detection circuit trigger to provide an effective barrier during transient events. The component has a peak pulse voltage rating of 850V, a continuous AC RMS voltage of 250V, and a current rating of 600mA. It operates within a temperature range of -55°C to +125°C and utilizes a DFN surface-mount package.

Feature Summary

• Dual-channel architecture providing independent protection paths
• MOSFET detection circuit trigger for rapid response to faults
• Solid-state silicon construction for reliable current suppression
• Compact SMT packaging suitable for space-constrained designs

Applications

• RS-485 interface protection
• Factory automation systems
• Process control equipment
• Protection modules and dongles

Procurement Notes

Verify the specific suffix WH against the manufacturer datasheet to confirm tape and reel configuration or specific packaging variant. Ensure the 850V peak pulse voltage rating aligns with the system's transient requirements. Confirm that the dual-channel topology meets the design's isolation needs. Check RoHS compliance status for regulatory adherence in target markets.

Selection Notes

Select this component when dual-channel protection is required for sensitive electronics against high-energy surges. The 850V rating suits applications with higher transient voltages compared to lower-rated variants. Consider the DFN package size for PCB layout constraints. Evaluate the 600mA current handling capability against the load requirements to ensure adequate protection without nuisance tripping.

Part Context

This part belongs to the Bourns TBU-DF series of dual-channel high-speed protectors. These devices are engineered to block transient currents and provide voltage isolation. The series complements other Bourns overvoltage products to offer comprehensive surge protection solutions for industrial and communication interfaces.

Replacement Considerations

Consult official substitution guides for compatible TBU-DF variants with matching voltage and current ratings. Verify pin compatibility and thermal characteristics before replacing. Cross-reference with TBU-CA series if single-channel protection suffices.