... information1,CQC,UL, CSA certification 2, Widely used in computer termias, vending machine 3, can be divided into ... grade optocoupler1,CQC,UL, CSA certification2, Widely used in computer termias, vending machine3, can be divided into B/ ... Bin Grade Min. CTR(100%)Max.CTR(100%)B130260C200400D300600Application1, Computer terminals2, Systems control, measurement instruments3, Copying machine, Printer, ...