The LTH-872-N55H 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-N55H can be seen below.