CNY17-3 Phototransistor Output, With Base Connection

From the shop's description

Features Isolation Test Voltage 5300 VRMS Long Term Stability Industry Standard Dual-in-Line Package Lead-free component Component in accordance to RoHS 2002/95/EC and WEEE 2002/96/EC Description The CNY17 is an optically coupled pair consisting of a Gallium Arsenide infrared emitting diode optically coupled to a silicon NPN phototransistor. Signal information, including a DC level, can be transmitted by the device while maintaining a high degree of electrical isolation between input and output. The CNY17 can be used to replace relays and transformers in many digital interface applications, as well as analog applications such as CRT modulation.