Siemens 3SE5112-0LD02 Enclosure width 40 mm acc. to EN 50041. Siemens 3SE5112-0LD02 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 DIN EN 50041, device connection 1x (M20 x 1.5) 1 NO/2 NC quick action contacts, roller plunger with 3 mm overtravel and stainless steel roller 13 mm.