Siemens 3SE5232-0BC05 Enclosure width 31 mm acc. to EN 50047. Siemens 3SE5232-0BC05 is the exact printed commercial reference for a limit or safety switch in the SIRIUS 3SE range. Siemens' official product description is: position switch plastic enclosure according to EN 50047, 31 mm device connection 1 x(M20 x 1.5), 1 NO/1 NC slow action contacts, rounded plunger, form B.