The RP 20 reflective photo-electric switch has been specially developed for door installations and offers the optimum solution for this application. At their simplest, they operate as on/off gates, allowing light to pass with low insertion loss in the open state and blocking transmission (causing high insertion loss) when closed. However, more advanced devices can route one. Mouser is an authorized distributor for many optical switch manufacturers including Broadcom, Omron, onsemi, Sharp Micro, TT Electronics, Vishay & more. Please view our large selection of optical switches below.