The Marcus MTC100-23 is a 100VA open-frame transformer designed for reliable performance in various applications. It features a primary voltage of 208V and a secondary voltage of 120V, making it suitable for a range of control and power needs. Built with quality and durability in mind, this transformer is a dependable choice for industrial and commercial settings.This Marcus transformer, model MTC100-23, has a power rating of 100VA. It operates with a primary voltage of 208V and provides a secondary voltage of 120V. The transformer is of the open-frame type, indicating a dry-type construction.