Siemens 3SE5132-0LR01 Enclosure width 40 mm acc. to EN 50041. Siemens 3SE5132-0LR01 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 1 x (M20 x 1.5) 1 NO/2 NC quick action contacts Spring rod actuator 142.5 mm total length with plastic plunger 50 mm.