The IBS249 from ISOBAUD is a Space Qualified Optocoupler with Forward Voltage 1.1 to 1.8 V, Isolation Voltage 1500 V, On-State Collector Current 2 to 12 mA, Power Consumption 100 mW(Emitter power dissipation), Resistance 10 Ohms. Tags: Surface Mount. More details for IBS249 can be seen below.