Optocoupler 4N25

IR LED Forward Voltage for turning ON: 1.25V-1.5V (Typically 1.3V, 1.5V being absolute maximum forward voltage)
IR LED Forward Current during ON: 10mA – 60mA (Typically 10mA, 60mA being absolute maximum forward current)
IR LED Reverse Voltage Maximum: 5V
IR LED Reverse Current Maximum: 100uA
Maximum voltage across COLLECTOR and EMITTER of TRANSISTOR: 70V
Maximum current allowed trough TRANSISTOR COLLECTOR: 100mA
Typical Rise Time: 2us
Typical Fall Time: 2us
No additional power needed to be applied for chip for making it work.