Siemens 3SE5112-0CH01 Enclosure width 40 mm acc. to EN 50041. Siemens 3SE5112-0CH01 is the exact printed commercial reference for a limit or safety switch in the SIRIUS 3SE range. Siemens' official product description is: Position switch Metal enclosure 40 mm according to EN 50041 Device connection 1x (M20 x 1.5) 1 NO/1 NC quick action contacts Rotary actuator right/left adjustable, Metal lever 27 mm long and plastic roller 19 mm.