Marquardt 1660 Series Push Button Switches Marquardt 1660 series single and double pole push button switches. The 1660 push button switches are suitable for use in Class II appliances and are available with non illuminated or illuminated (amber or green) 230Vac neon actuators. The Marquardt 1660 push button series have silver contacts with SPNO, DPNO, DPDT and DPST switching formats. A transparent PVC cover is available to protect the 1660 series of push button switches from dust and water ingression and to give the push button switch actuator an IP64 rating. Contact distance ≥3mm (apart from stock number 741-0760 which has a contact distance less than 3mm) Operating force approximately 8N UL 94 V-2 flammability Mechanical life 50,000 operations Stock number 907-0348 would be the correct lamp in red 907-0342 is the green version