3386F-1-254LF is a 3/8" square single-turn cermet trimming potentiometer designed for industrial applications requiring precise resistance adjustment. This top adjust model features a 250 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 a mechanical angle of 310° nominal, adjustment angle of 280° nominal, and infinite resolution for fine-tuning. It is sealed for environmental protection and meets MIL-STD-202 humidity testing standards, with vibration resistance up to 30 G and shock resistance up to 100 G. The LF suffix indicates 100% tin-plated RoHS compliant terminations, making it suitable for lead-free soldering processes in precision instrumentation and calibration applications.