... ,JC817S1 CQC UL ,CSA approved High Density Mounting Type OPTOCOUPLER PC817 optical coupler JC817 - Basic Features: 1. Current transfer ratio (CTR ... silicon,phototransistor2. The lead pitch is 2.54mm3. Replace for PC817 ,P521 series- Applications: 1. Computer terminals.2. System appliances, measuring ... RoHS standard4.High isolation voltage between input and output OPTOCOUPLER PC817