PN: AT611-12V-RO (Nkk switches of america inc) PN: AT611-28V-RO (Nkk switches of america inc) PN: AT611-5V-RO (Nkk switches of america inc) PN: AT615-RO (Nkk switches of america inc) PN: AT618C (Nkk switches of america inc) PN: AT618E (Nkk switches of america inc) PN: AT618F (Nkk switches of america inc)