Schneider Electric 8660B-5DI Solid State Reduced Voltage Control Circuit Module

Schneider Electric's Square D 8660B-5DI Solid State Reduced Voltage Control Circuit Module is a dedicated control module that plugs into compatible 8660B motor-control assemblies to provide reduced-voltage starting via solid-state electronics. The 8660B-5DI is part of the Square D 8660B family of control modules used in motor-starter systems, designed to govern how voltage is applied to a motor during start-up in conjunction with the associated contactor and overload protection. By using solid-state switching, this module enables reduced-start voltage in the circuit, contributing to controlled starting currents in industrial panels. It is sold as a separate module for integration with the broader Square D reduced-voltage starter ecosystem under Schneider Electric. Typical deployments include industrial control panels where a dedicated reduced-voltage control circuit is specified as part of the motor-start sequence, in systems that require reliable, fast switching without mechanical wear from relay contacts. For proper installation, this module should be used with the corresponding 8660B starter components and configured within the approved Square D control scheme, following the manufacturer's installation instructions.