Vishay VO615A-5 DC Input Phototransistor Output Optocoupler, Through Hole, 4-Pin DIP. Output Device Phototransistor. Optocoupler, Transistor Output, VO6xxA Series, Vishay Semiconductor. 5 x ON Semiconductor, FOD852 DC Input Photodarlington Output Optocoupler, 4-Pin.
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