3386W-1-203 is a 3/8" square single-turn cermet trimming potentiometer designed for industrial applications requiring precise resistance adjustment. This side-adjust model features a 20 kO resistance value with ±10% tolerance, a power rating of 0.5 watt at 85°C, and operates over a temperature range of -55°C to +125°C. The potentiometer offers infinite resolution with an adjustment angle of 280° nominal and a mechanical angle of 310° nominal. It is sealed for environmental protection and meets MIL-STD-202 Method 103 humidity requirements. Common applications include circuit calibration, voltage divider adjustments, and precision tuning in industrial and instrumentation equipment.