Schneider Electric SK-5666 U Three-Phase Contactor

Schneider Electric's Square D SK-5666 U is a purpose-built enclosure accessory kit that provides three-pole mounting hardware for Square D panels and enclosures. Sold with the Q1BB and A1B configuration codes, this kit includes three-pole mounting fingers that align and secure three-position devices—such as contactors or breakers—inside compatible Square D enclosures. Rather than a switch or control device itself, the SK-5666 U functions as an installation accessory that simplifies mounting, reduces misalignment, and helps maintain inspection clearance and safe enclosure interiors. Designed for use with Square D enclosures that accept SK-5666 hardware, it supports neat, code-compliant installation in industrial control panels and electrical distribution cabinets. Whether you're retrofitting existing gear or fabricating a new control panel, this hardware kit provides the essential mounting brackets and fittings to hold a 3-pole device firmly in place and makes service and replacement straightforward. Brand and compatibility details place it squarely within Schneider Electric's Square D ecosystem, ensuring consistent fit with other SK-series accessories and the enclosure’s interior mounting rails.