Siemens 3SE5134-0LA00-1AE0 Enclosure width 40 mm acc. to EN 50041. Siemens 3SE5134-0LA00-1AE0 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 40 mm according to EN 50041 device connection 1x (M20 x 1.5) 1 NO/2 NC quick action contacts with M12 plug, 4-pole 2 NC connected pin assignment: Pin1=21, Pin2=22 Pin3=31, Pin4=32 max. 250 V and 4 A.