The 3306F-1-203 is a 6 mm round single-turn Trimpot trimming potentiometer manufactured by Bourns, designed for industrial open-frame applications requiring precision resistance adjustment. This cermet-element potentiometer features a 20 kO resistance value with ±25% standard tolerance, an adjustment angle of 215° nominal, and essentially infinite resolution for fine tuning. It operates over a temperature range of -25°C to +100°C with a temperature coefficient of ±250 ppm/°C, and is rated for 0.2 watts at 70°C with a maximum operating torque of 4.5 oz-in. The device includes dust and splash-resistant covers, cross-slot adjustment options, and solderable pins for secure PCB mounting, making it ideal for circuit calibration, signal conditioning, and equipment tuning in industrial and commercial electronics.