The 53UAD-T16-A17L is a sealed 1/2" (12.5 mm) square control potentiometer from Bourns designed for professional audio and general control applications. This Model 53 unit features solder lug terminals for PCB mounting and is available with either conductive plastic or cermet resistive elements in linear or audio taper configurations. The potentiometer offers resistance ranges from 150 ohms to 1 megohm (cermet) or 1 kilohm to 1 megohm (conductive plastic), with tolerance options of ±5%, ±10%, or ±20% depending on the element type and taper. The device includes a metal bushing and shaft, is sealed for board washing, and features an effective electrical angle of 270° ±5°. Its compact sealed design and gangable configuration make it suitable for professional audio equipment, mixing consoles, and other control applications requiring reliable, sealed potentiometer performance.