Siemens 3SE5112-3LA00 Enclosure width 40 mm acc. to EN 50041. Siemens 3SE5112-3LA00 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 3SE51 Metal enclosure 40 mm according to EN 50041 Device connection 1x (M20 x 1.5) with 2 LEDs, 230 V AC yellow/green 1 NO/2 NC quick action contacts without actuator head.