Siemens 3SE5122-0CC02-1AA7 Enclosure width 56 mm. Siemens 3SE5122-0CC02-1AA7 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 56 mm wide Device connection 3 x (M20 x 1.5) 1 NO/1 NC quick action contacts Rounded plunger, with 3 mm overtravel made of stainless steel Actuating/restoring force 30 N only available as complete unit.