TC33X-1-504E is a 3 mm surface-mount trimming potentiometer (Trimpot) manufactured by Bourns, designed for precision resistance adjustment in compact electronic assemblies. The device features a 500 kO resistance value with ±25% tolerance, continuous rotation mechanical angle, and an adjustment angle of 270° ± 20°, providing essentially infinite resolution for fine-tuning applications. It operates across a temperature range of -40°C to +100°C with a power rating of 0.15 watts at 70°C, and exhibits a temperature coefficient of ±250 ppm/°C for stable performance. The TC33X-1-504E is RoHS compliant, recommended for reflow soldering, and compatible with pick-and-place and automatic adjustment equipment, making it ideal for instrumentation, signal conditioning, and calibration circuits where space constraints and precision tuning are critical requirements.