The 53AAA-B28-B15L is a sealed 1/2" (12.5 mm) square control potentiometer manufactured by Bourns, designed for professional audio and general control applications. It features a cermet element with linear taper and ±10% tolerance, solder lug terminals for PC board mounting, and a single section with no detent. The potentiometer operates with a mechanical angle of 290° ±5°, running torque of 0.15 to 1.4 N-cm for single section operation, and a stop strength of 56 N-cm (5 lb.-in.). It is sealed for board washing, RoHS compliant, and includes an anti-rotation lug for secure mounting. This potentiometer is ideal for audio equipment, mixing consoles, and other professional control applications requiring reliable, sealed operation in demanding environments.