The 66015-001 from Micropac Industries is a Space Qualified Optocoupler with Forward Voltage 0.8 to 1.3 V, Isolation Voltage 1000 V, Continuous Current 50 mA (Collector), On-State Collector Current 1.5 mA, Power Consumption 190 mW(Power Dissipation). Tags: Through Hole. More details for 66015-001 can be seen below.