TBU-CA025-050-WH-Q

Overview

The Bourns TBU-CA025-050-WH-Q is a board-mount surge protector from the TBU series, designed for bidirectional circuit protection. It features a maximum reverse standoff voltage of 250 V and a trigger current rating of 50 mA. The device operates within a temperature range of -55°C to +125°C and utilizes an SMD/SMT DFN-3 package with a height of 0.8 mm. It holds AEC-Q101 qualification for automotive applications.

Feature Summary

• Provides integrated overcurrent and overvoltage protection in a compact surface-mount footprint.
• Bidirectional configuration ensures effective protection for signal lines regardless of polarity.
• Automotive-grade reliability confirmed by AEC-Q101 qualification standards.

Applications

• Voice cards
• VDSL cards

Procurement Notes

Verify that the specific suffix '-Q' denotes AEC-Q101 automotive qualification distinct from standard commercial variants. Confirm the DFN-3 package dimensions and soldering profile requirements against the official datasheet before integration. Ensure the 50 mA trigger current aligns with the protected circuit's operational limits to prevent nuisance tripping during normal operation.

Selection Notes

Select this component when bidirectional protection is required for low-current signal lines up to 50 mA. The 250 V rating suits applications where transient voltages may exceed standard logic levels but remain below higher industrial thresholds. The small DFN-3 form factor is suitable for space-constrained designs requiring robust surge suppression without significant PCB area consumption.

Part Context

This part belongs to the Bourns TBU (Transient Breakdown Unit) family, which combines TVS diode and fuse functions into a single semiconductor device. The CA series specifically addresses high-speed data and communication line protection needs. The TBU-CA025-050-WH-Q represents the automotive-qualified variant within the 250 V, 50 mA performance bracket of this product line.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Cross-reference with other Bourns TBU-CA series devices only if electrical parameters match exactly and automotive qualification is not required.