The NTE3039 from NTE Electronics, Inc is a Phototransistor with Collector Emitter Voltage (Breakdown) 30 V, Collector-Dark Current 100 nA, Collector Emitter Voltage(Saturation) 0.4 V, Emitter Collector Voltage(Breakdown) 30 V, Power Dissipation 70 mW. More details for NTE3039 can be seen below.