Allen-Bradley S50399 Driver Board

Allen-Bradley S50399 Driver Board is a replacement drive board used inside Allen-Bradley 1334-series motor drives to control 15–20 HP motors. The part is catalogued under several identifiers—50399, S50399, 1334-50399, and SP-50399-001—reflecting its role across the 15–20 HP drive family. Rockwell documentation notes that P/N 50399 encompasses 22- and 28-amp driver board configurations, indicating current variant options within the same part family. Distributor listings confirm this driver board designates a 15–20 HP drive and identify the model as discontinued by the manufacturer. Typical applications include medium-power industrial applications where Allen-Bradley drives are used to regulate speed and torque of motors such as conveyors, pumps, mixers, and other production-line equipment. The S50399 designation is commonly found in aftermarket listings and refurbishing services, underscoring its status as a legacy replacement part for older Allen-Bradley drive systems.