The 91A1A-B24-D13L is a 5/8" square single-turn panel control potentiometer manufactured by Bourns, designed for applications requiring electrical circuit isolation and reliable resistance control. This model features a conductive plastic element with standard resistance range from 1 kilohm to 1 megohm, offering a total resistance tolerance of ±0.10% or ±20% and independent linearity of ±5%. The potentiometer is available with metal or plastic shaft options and provides virtually infinite electrical circuit isolation, making it suitable for audio equipment, instrumentation, and consumer electronics where precise volume or parameter adjustment is required. Its RoHS-compliant construction and variety of pin-out configurations ensure compatibility with diverse circuit designs and regulatory requirements.