The 3549S-1AC-103B is a 10-turn precision potentiometer manufactured by Bourns, designed for high-accuracy control and measurement applications in HMI and MMI systems. It features a wirewound element with a standard resistance of 10 kO, total resistance tolerance of ±3%, and independent linearity of ±0.2% (with optional 0.1% maximum practical linearity). The potentiometer offers an effective electrical angle of 3600° ±10°, -0°, with a mechanical angle of 3600° ±10°, -0°, and exhibits high rotational life with low backlash of 1.0° maximum. It is RoHS compliant and suitable for use under some side load conditions, with optional features including anti-rotation lugs, dual gang configuration, servo mount, and dual ball bearing options. The device is ideal for precision instrumentation, servo systems, and applications requiring stable, repeatable performance with minimal noise and excellent linearity.