The 3310C-001-503L is a 9 mm square sealed panel control potentiometer manufactured by Bourns, featuring a conductive plastic element with a plastic bushing and slotted shaft design. It offers a standard resistance range of 1 kO to 1 MO with ±20% tolerance, an effective electrical angle of 270° ±15°, and independent linearity of ±5%. The device is rated for 0.25 watts power dissipation at 70°C, operates across -40°C to +125°C, and achieves an IP67 rating for sealed protection against industrial washing processes. With a rotational life of 50,000 cycles (no load) and 1,000-hour load life, this potentiometer is ideal for professional audio equipment, industrial control panels, and applications requiring compact, sealed panel-mount controls with reliable performance in harsh environments.