DESCRIPTION

The 3309W-1-202 is a 9 mm round single-turn cermet trimming potentiometer manufactured by Bourns, designed for industrial open-frame applications with single-side (front) adjustment capability. It features a cross-slot adjustment design, dust-resistant and splash-resistant covers, and supports both horizontal and vertical mounting styles with PC board stand-offs and retention features. The device offers a standard resistance range from 100 ohms to 2 megohms with ±25% tolerance, an adjustment angle of 235° nominal, and a mechanical angle of 260° ±10°. Operating specifications include a maximum power rating of 0.5 watt at 70°C, operating torque of 5 oz-in. maximum, and a temperature range of -25°C to +100°C with a temperature coefficient of ±250 ppm/°C. This trimmer is ideal for precision calibration and adjustment applications in industrial electronics, instrumentation, and control systems where reliable potentiometric tuning is required.