The 51AAD-B28-D15L is a sealed 1/2" (12.5 mm) square control potentiometer featuring a linear cermet element with 150 ohms resistance and ±10% tolerance. It is designed for PC board mounting with a single section, no detent configuration, and includes a U-style bushing (7 mm diameter × 8 mm length) with an M7 × 0.075-6g shaft. The device is RoHS compliant and sealed for board washing, providing robust protection against environmental contamination. Key dimensional specifications include a shaft diameter of 0.79 ± 0.10 mm and bushing diameter of 1.52 ± 0.25 mm. This potentiometer is ideal for professional audio applications, control panels, and sealed environments where reliability and precision are required.