3386F-1-203LF is a 3/8" square single-turn cermet trimming potentiometer from Bourns' 3386 Trimpot series, designed for precision resistance adjustment in industrial applications. This top adjust model (F style) features a 20 kO resistance value with ±10% tolerance, 0.5 watt power rating at 85°C, and an operating temperature range of -55°C to +125°C. The potentiometer offers infinite resolution with a 280° nominal adjustment angle and 310° mechanical angle, sealed construction for environmental protection, and 100% tin-plated (LF) terminations for RoHS compliance. Common applications include circuit calibration, voltage divider adjustments, and precision tuning in electronic equipment where reliable and repeatable resistance adjustment is required.