The 66015-001 from Micropac Industries is a Space Qualified Optocoupler with Forward Voltage 0.8 to 1.3 V, Isolation Voltage 1000 V, On-State Collector Current 1.5 mA, Power Consumption 190 mW(Power Dissipation), Collector-Emitter Breakdown Voltage 35 V. Tags: Through Hole. More details for 66015-001 can be seen below.