The KP-1608P1C from kingbrightusa is a Phototransistor with Collector Emitter Voltage (Breakdown) 30 V, Collector-Dark Current 100 nA, Collector Emitter Voltage(Saturation) 0.8 V, Emitter Collector Voltage(Breakdown) 5 V, On-State Collector Current 0.1 to 0.3 mA. More details for KP-1608P1C can be seen below.