The LTH-872-N55T1 from LITE-ON is a Photointerrupter with Rise Time 3 to 15 µs, Power Dissipation 75 mW (Input), 100 mW (Output), Fall Time 10 µs, Collector Current 20 mA, Collector-Dark Current 100 nA. More details for LTH-872-N55T1 can be seen below.