Siemens 3SE3020-1A is a 30 mm wide open-type position switch (limit switch) with snap-action contacts configured as 1 NO and 1 NC, and it uses a metal plunger actuating mechanism. The housing is a plastic open-type enclosure with IP20 protection, and the unit measures 59.5 mm in length and 30 mm in width, with a 5 mm-diameter switch head. The operating mechanism is mechanical, featuring a rounded plunger and rounded switch head for smooth actuation. Typical applications include end-of-travel and position-detection on industrial automation equipment and safety interlock circuits in control systems.
