"CONSISTS OF A GALLIUM ARSENIDE LIGHT EMITTING DIODE OPTICALLY COUPLED TO A SILICON NPN PHOTO TRANSISTOR,SIX LEAD DUAL-IN-LINE PKG,ENCAPSULATED IN A NONCONDUCTIVE PLASTIC CASE,0.360 IN. LG,0.250 IN. W,0.200 IN. H,COLLECTOR-BASE VOLTAGE 30V,EMITTER-COLLECTOR VOLTAGE 4V,EMITTER-BASE VOLTAGE 4V,INPUT-DIODE REVERSE VOLTAGE 3V"