3540S-1-203L is a precision wirewound potentiometer from the Bourns 3540 series, designed for applications requiring accurate and repeatable resistance adjustment. It features a 20,000 O resistance value with ±5% tolerance, 0.014% resolution, and ±0.25% independent linearity over an effective electrical angle of 3600° (+10°, -0°). The bushing mount design includes gold-plated solder lugs for reliable connections, with a power rating of 2 watts and dielectric withstanding voltage of 1,000 VAC minimum at sea level. This RoHS compliant potentiometer is ideal for precision instrumentation, calibration equipment, and industrial control systems where high accuracy and stability are essential.