The 3299Y-1-203 is a 3/8" square multiturn Trimpot® trimming potentiometer manufactured by Bourns, designed for industrial sealed applications requiring precision resistance adjustment. This cermet-element potentiometer features a 20 kO resistance value (code 203) with ±10% standard tolerance, infinite resolution, and 25 turns of effective travel for fine adjustment control. It operates across a temperature range of -55°C to +125°C with a power rating of 0.5 watts at 70°C, dielectric strength of 1,000 V minimum, and insulation resistance of 500 V DC, making it suitable for demanding industrial environments. The device includes solderable pins, mechanical stops with wiper idle positioning, and is available in RoHS-compliant tin-plated termination, with common applications in signal conditioning, calibration circuits, and precision measurement instrumentation.