Square D Model 3

Square D Model 3 is a legacy motor control center (MCC) originally installed throughout North America during the 1970s and early 1980s. Built with heavy-gauge steel frames and modular construction, these MCCs were engineered for durability and ease of maintenance. Though discontinued, Model 3 units remain in service in older industrial facilities, commercial buildings, and public infrastructure.
AmpState provides support for Model 3 retrofit and replacement buckets, including starter kits, breakers, contactors, and thermal overloads. We also offer compatibility analysis for migration to newer systems, including Model 5 and Model 6, with retrofit options that reduce downtime and cost.