Siemens 3SE5000-0AA31 Enclosure width 31 mm acc. to EN 50047. Siemens 3SE5000-0AA31 is the exact printed commercial reference for a limit or safety switch in the SIRIUS 3SE range. Siemens' official product description is: twist lever for position switch 3SE52 Stainless steel lever 21 mm long plastic roller 19 mm according to EN 50047.