Current Transfer Ratio: Min. 50% at IF = 5 mA, VCE = 5 V. 
<br />High isolation voltage between input and output (Viso = 5000 V rms) 
<br />Size (L x W x H): approx. 9 x 4 x 7 mm 
<br />Color: As shown 
<br />The EL817 optocoupler contains an infrared light emitting diode, optically coupled to phototransistor optocouplers. The EL817 is packaged in a 4 pin DIP package. applications: System computer terminals, measuring devices registers, copiers, vending machines. Cassette Recorder Type Electrical Appliances such as as electric heaters, etc. 
<br />The signal transmission between circuits of different potentials and impedances. 
<br />Package Contents: 10 x EL 817 Optocouplers
<br />Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.The measurement allowed error is +/- 1-3 cm.