Siemens 3SE5000-0AA57 Enclosure width 31 mm acc. to EN 50047. Siemens 3SE5000-0AA57 is the exact printed commercial reference for a limit or safety switch in the SIRIUS 3SE range. Siemens' official product description is: Adjustable-length Twist lever for position switch 3SE51/52 Metal lever 100 mm long Plastic roller 50 mm.