Siemens 3SE5000-0AA23 Enclosure width 31 mm acc. to EN 50047. Siemens 3SE5000-0AA23 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 Metal lever, 21 mm long Ball bearing roller 19 mm made of stainless steel.