3386Y-1-503LF is a 3/8" square Trimpot trimming potentiometer from Bourns designed for precision resistance adjustment in industrial applications. This single-turn cermet potentiometer features a 50 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 device offers infinite resolution with a 280° nominal adjustment angle and 310° mechanical angle, along with excellent environmental performance including vibration resistance up to 30 G and shock resistance up to 100 G. The 3386Y style provides top adjust capability with solderable pins featuring 100% tin-plated (RoHS compliant) terminations, making it suitable for precision trimming applications in instrumentation and control circuits.