Square D 1775S1U18A U 120V Programmable Logic Module

Square D 1775S1U18A is a 120V AC coil designed for Square D Type S motor starters within the 1775 family, primarily used with Size 3 and Size 4 starters in motor-control circuits. It accepts standard control voltage for 120V operation and is compatible with 50/60 Hz systems, with listings noting variants that reflect 110/120V configurations depending on regional catalogs. The 1775-S1-U18A designation identifies the specific coil variant used to energize the starter’s coil, enabling the controlled energization of the motor-starting mechanism in industrial applications. Common uses include equipment such as conveyors, pumps, and fans where reliable coil-actuated control is required for motor starting and stopping, using Square D’s established 1775 Type S starter platform. As a Square D (Schneider Electric) component, this coil is widely listed as a replacement part in maintenance and upgrade projects for existing 1775 Type S starters, ensuring compatibility with the established Square D motor-control ecosystem.