Allen-Bradley 40021-558-02 3-Pole Disconnect Switch

Allen-Bradley 40021-558-02 is a 3-pole disconnect switch designed to isolate three-phase power within industrial control panels. It is listed under Allen-Bradley panel accessories as a disconnect switch and is discontinued by the manufacturer, reflecting its place in Rockwell Automation's legacy catalog. The unit weighs 2.3 lb and is described by distributors as part of starter-switch assemblies used in motor-control applications, indicating its role in providing a safe isolation point for maintenance. The part number 40021-558-02 identifies a three-pole disconnect switch intended for use with legacy Allen-Bradley equipment and compatible assemblies within the Rockwell Automation ecosystem. As a legacy AB component, it remains a reference option for retrofits or repairs on older panels that originally specified this model.