The PT5529B/L2/H2-F from EVERLIGHT Electronics is a Phototransistor with Collector Emitter Voltage (Breakdown) 5 V, Collector-Dark Current 100 nA, Collector Emitter Voltage(Saturation) 0.4 V, Emitter Collector Voltage(Breakdown) 30 V, Power Dissipation 75 mW. More details for PT5529B/L2/H2-F can be seen below.