The 3386S-1-203LF is a 3/8" square Trimpot trimming potentiometer designed for precision resistance adjustment in industrial applications. This single-turn cermet potentiometer features a 20 kO resistance value with ±10% tolerance, side adjust configuration (S style), and 100% tin-plated terminations for RoHS compliance. It offers a power rating of 0.5 watt at 85°C, an operating temperature range of -55°C to +125°C, and a temperature coefficient of ±100 ppm/°C. The sealed construction provides environmental protection with humidity and vibration resistance per MIL-STD-202 standards. Common applications include calibration, tuning, and adjustment circuits where reliable, repeatable resistance settings are required.