The 91A1D-C24-A15L is a 5/8" square single-turn panel control potentiometer manufactured by Bourns, featuring a 3/4" shaft length (24 mm) with a linear cermet element rated at ±10% tolerance. This model offers resistance values ranging from 100 ohms to 1 megohm depending on the selected taper code, with an effective electrical angle of 240° ± 5° and independent linearity of ±5%. The potentiometer is available with multiple shaft types (A through W) and bushing configurations, supporting both metal and plastic shaft options for flexible mechanical integration. It is RoHS compliant and designed for virtually infinite electrical circuit isolation, making it suitable for audio equipment, instrumentation, and consumer electronics requiring reliable panel-mounted control interfaces.