Square D 8810SDO1 Electrical Control Relay Assembly

Square D 8810SDO1 Electrical Control Relay Assembly is an 8810 Class, Type SDO two-speed magnetic starter from Square D, designed for industrial motor control. The SDO designation identifies a two-speed option, and this specific model ships without the control coil—the U coil is not included. The 8810SDO1V02S variant exists as a coil-configuration option, indicating the coil voltage selected for a given installation. The unit is rated for operation up to 600 volts, suitable for common industrial power systems, and uses the standard 8810 family mounting and electrical interface for compatibility with related accessories and control circuits. Typical applications include switching between two motor speeds in conveyors, pumps, and other industrial machinery. This relay assembly provides the essential switching function to enable two-speed operation when paired with an appropriate external coil and protection devices, maintaining compatibility with other Square D components and control panels.