TBU-DF055-500-WH

Overview

The Bourns TBU-DF055-500-WH is a dual-channel high-speed protection device from the TBU-DF series. It provides bidirectional circuit protection against short circuits, overvoltage transients, and battery cell failures. The component features MOSFET detection circuit triggering to create an effective barrier during transient events. It operates within a peak pulse voltage range of 550V to 850V and supports continuous AC RMS voltages between 250V and 425V, depending on the specific model variant.

Feature Summary

• Dual-channel architecture for simultaneous signal line protection
• MOSFET detection circuit triggering for rapid response
• Solid-state silicon construction for reliable reset capability
• Compact surface-mount package design

Applications

• RS-485 interface protection
• Factory automation systems
• Process control equipment
• Protected module and dongle circuits

Procurement Notes

Verify the exact part number suffix against official Bourns documentation to confirm pinout and electrical ratings. Ensure the selected variant matches the required peak pulse voltage and trigger current specifications for the target application environment. Cross-reference datasheet parameters with system design requirements before procurement.

Selection Notes

Select this component when dual-line protection is required for high-speed data interfaces. Consider the specific voltage rating needed for the application, as the TBU-DF series offers multiple variants. Evaluate the need for bidirectional protection and fast transient response times inherent to the TBU technology compared to standard TVS diodes.

Part Context

This device belongs to the Bourns TBU® High-Speed Protection (HSP) family. These solid-state current limiters act as effective barriers by blocking transient currents and providing voltage isolation. The TBU-DF series specifically addresses applications requiring protection for two channels simultaneously, such as differential data lines in industrial environments.

Replacement Considerations

Consult official Bourns substitution guides for direct equivalents. Verify that any substitute maintains the dual-channel configuration and compatible trigger characteristics. Ensure the replacement meets the same peak pulse voltage and continuous operating voltage requirements.