TBU-DF055-200-WH

Overview

The Bourns TBU-DF055-200-WH is a board mount surge protector featuring a bidirectional MOSFET-based detection circuit. It provides overcurrent and overvoltage protection with a peak impulse voltage rating of 550V and a trigger current of 200mA. The device operates within a continuous AC RMS voltage range of 250V to 425V, depending on the specific model configuration. It supports an operating temperature range from -55°C to +125°C and utilizes a compact DFN surface-mount package for integration into high-speed circuits.

Feature Summary

• MOSFET detection circuit triggers effective barrier against large voltage or current transients
• Bidirectional protection capability for sensitive electronic components
• Compact SMT package design suitable for space-constrained applications

Applications

• RS-485 interface protection
• Protection modules and dongles
• Test and measurement equipment

Procurement Notes

Verify the exact datasheet version for the TBU-DF055-200-WH to confirm specific electrical tolerances and thermal characteristics. Ensure the selected component matches the required bidirectional functionality and voltage ratings for the target application. Cross-reference the manufacturer's official documentation for any updates regarding manufacturing sites or assembly locations that may affect compliance or marking.

Selection Notes

Select this component when high-speed response and robust transient protection are required for RS-485 or similar industrial interfaces. The bidirectional nature makes it suitable for lines where polarity may vary or is undefined. Consider the DFN package size for PCB layout constraints and verify the operating temperature range meets the environmental requirements of the end product.

Part Context

This part belongs to the Bourns TBU-DF series of dual-channel high-speed protectors. These devices are designed to prevent short circuits, overvoltage transients, and battery cell failures. The series offers peak pulse voltage ranges from 550V to 850V, providing a reliable solution for protecting sensitive electronics in demanding electrical systems.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult the manufacturer's official cross-reference guides for verified alternatives.