... ratio (CTR:MIN. 50% at If=5mA, Vce=5V)2.High input-output isolation voltage (Viso=5,000Vrms)3.Response time ... , CSA, VDE, TUV, FIMKO, NEMKO, SEMKO, approved5. This product doesn't contain restriction substrance, comply RoHs standard.Applications:1.Computer terminals ... buy, the cheaper it is!Welcome your enquiry!!! PC817S smd high intensity mounting type photocoupler