The 53RAA-R25-A20L is a sealed 1/2" (12.5 mm) square control potentiometer manufactured by Bourns, designed for professional audio and general control applications. This model features a cermet element with linear taper and ±10% tolerance, supporting resistance values from 150 ohms to 1 megohm with an effective electrical angle of 270° ±5°. The potentiometer is RoHS compliant, sealed for board washing, and available with solder lug terminals (Model 53 configuration) for robust PCB integration. It includes a metal bushing and shaft with anti-rotation lug options, gangable design for multi-channel applications, and independent linearity of ±5%. The sealed construction and cermet element provide excellent durability and reliability in professional audio equipment, industrial control panels, and applications requiring long-term performance in challenging environments.