... condition that IF = 5mA, VCE = 5V , CTR: MIN. 50%)2. Isolation voltage between the input/output (VISO = 5,000 Vrms)3 ... approved7. CSA approved Description:1. JC817 is an optical coupling isolation device, which consists of a GaAs light emitting diode and ... such as fans, water heaters and so on.5 Electric isolation and signal transmission between the high and low voltage circuit.