The 3312J-1-203E is a 2 mm SMD Trimpot® trimming potentiometer manufactured by Bourns, designed for surface-mount assembly with a 20 kO resistance value and cermet construction. It features a sealed design with an adjustment angle of 255° nominal and mechanical stop at 285° nominal, providing reliable and repeatable tuning in compact form factor. The device operates over a temperature range of -55°C to +125°C with a power rating of 0.1 watt at 70°C, and offers voltage divider adjustability of ±0.4% and rheostat adjustability of ±0.8%. With ±20% standard resistance tolerance, 500 VDC insulation resistance of 100 MO minimum, and dielectric strength of 500 VAC at sea level, this trimmer is ideal for precision calibration, signal conditioning, and circuit tuning in industrial and consumer electronics applications.