www.ct-micro.com CTH217 Series DC Input 4-Pin Hal.
CTH217A - Phototransistor Optocoupler
CTH217B - Phototransistor Optocoupler
CTH217 - Phototransistor Optocoupler
CTH217C - Phototransistor Optocoupler
CTH217D - Phototransistor Optocoupler