The CNY17F-2 series of optically coupled isolators consist of infrared light emitting diode and NPN silicon photo transistor in a standard 6 pin dual in line plastic package with the base pin unconnected.
High BVCEO (70V min) High Isolation Voltage (5.3kVRMS,7.5kVPK) Base pin unconnected for improved noise immunity in high EMI environment DC motor controllers Industrial systems controllers Signal transmission between systems of different potentials and impedances