This part is a kind of semiconductor called AZ5125-02F.

Function of this product has Transient Voltage Suppressing Device Tiny Package.

Manufacturers : Amazing Micro

Image and pinout :

Some of the text within the PDF file :

AZ5125-02F Transient Voltage Suppressing Device Tiny Package for ESD/Transient Protection Features ESD Protect for 2 Lines with Bi-directional Provide ESD protection for the protected line to IEC 61000-4-2 (ESD) ±15kV (air), ±15kV (contact) IEC 61000-4-4 (EFT) 50A (5/50ns) Cable Discharge Event (CDE) proprietary clamping cells in a single package. During transient conditions, the proprietary clamping cells prevent over-voltage on the power lines or control/data lines, protecting any downstream components. AZ5125-02F is bi-directional and may be used on lines where the signal swings above and below ground. AZ5125-02F may be used to meet the ESD immunity requirements of IEC 61000-4-2, Level 4 (±15kV air, ±8kV contact discharge). Ultra-small DFN1006P3X package (1.0mmx0.6mmx0.45mm) save [ ... ]

AZ5125-02F PDF Datasheet Download