The 3310Y-001-503L is a 9 mm square sealed panel control potentiometer manufactured by Bourns, featuring a conductive plastic element with a 50 kO linear resistance value. It incorporates a 5.08 mm × 5.08 mm triangular pattern rear exit terminal style with a slotted shaft and plastic bushing, designed for PC board and panel mounting applications. The device delivers robust electrical performance with a 270° ± 15° effective electrical angle, ±5% independent linearity, and ±20% total resistance tolerance, while maintaining contact resistance variation of 1% or 1 ohm maximum. With a 10K cycle switch life, 350 VDC dielectric strength, and 100 mA power rating at 16 VDC, this potentiometer is well-suited for professional audio equipment, industrial control panels, and consumer electronics requiring reliable, sealed panel-mounted volume or parameter adjustment controls.