The 209-1-1-53-2-9-100 is a single-pole E-frame hydraulic magnetic circuit protector designed for branch circuit protection in electronic and motor load applications. This unit features a DC long delay (53) trip characteristic, which provides extended response time suitable for motor loads, and operates at ratings up to 1 ampere at 240Vac or 125Vdc. The breaker is equipped with solderless front-connected terminals (code -1) that accept #14 through 0 copper or #12 through 0 aluminum wire, enabling flexible installation in panel boards and control systems. The single-pole configuration measures 1.026 ± 0.010 inches (26.06 ± 0.25 mm) in width and includes common-trip construction for coordinated protection. This circuit protector is ideal for EDP systems, air conditioners, lighting controls, and other applications requiring reliable overload and short-circuit protection with precise time-delay coordination.