Siemens 3SE5112-0MA00 Enclosure width 40 mm acc. to EN 50041. Siemens 3SE5112-0MA00 is the exact printed commercial reference for a limit or safety switch in the SIRIUS 3SE range. Siemens' official product description is: Basic switch for position switch 3SE5112 Metal enclosure, according to EN 50041 40 mm, 1 x (M20x 1.5) 1 NO/2 NC slow-action contacts with make-before-break without actuator head.