The 3386X-1-503T is a 3/8" square Trimpot® trimming potentiometer manufactured by Bourns, featuring a 50 kO resistance value with side-adjust (X-style) configuration and sealed industrial construction. This single-turn cermet potentiometer offers a resistance tolerance of ±10% standard, adjustability of ±0.05% in voltage divider mode, and an adjustment angle of 280° nominal with infinite resolution. The device operates over a temperature range of -55°C to +125°C, with a power rating of 0.5 watts at 85°C, and provides excellent environmental performance including 1,000 megohms minimum insulation resistance at 500 VDC and 900 VAC dielectric strength at sea level. The 3386X-1-503T is ideal for precision trimming applications in industrial equipment, instrumentation, and control systems where reliable, sealed adjustment is required.