TC33X-2-501E is a 3 mm surface-mount trimming potentiometer (Trimpot) manufactured by Bourns, designed for precision circuit tuning and adjustment applications. This device features a 500 ohm resistance value with ±25% tolerance, an adjustment angle of 270° ± 20°, and a rotational stop mechanism (TC33X-2 style) that prevents over-rotation. It operates across a temperature range of -40°C to +100°C with a temperature coefficient of ±250 ppm/°C, and is rated for 0.15 watts at 70°C with a maximum power rating of 50 VDC. The potentiometer exhibits essentially infinite resolution, contact resistance variation of 5% maximum, and is RoHS compliant with compatibility for reflow soldering and automated pick-and-place equipment. Common applications include circuit calibration, signal conditioning, and tuning in consumer electronics, industrial controls, and instrumentation where compact SMD form factor and reliable adjustment are required.