We sale all kinds of PHOTO COUPLER. (4 Pin Optocouplers)Part No.BrandCTR @BVCEOBVCBOVCE (sat)VISO10 mA IF(%)(V)(V)(V)AC[RMS]minmaxminmaxmaxTLP521-1TOSHIBA506005570.42.5kVTLP521-2TOSHIBA506005570.42.5kVTLP521-3TOSHIBA506005570.42.5kVTLP521-4TOSHIBA1006005570.42.5kVTLP621-1TOSHIBA506005570.410kVTLP721TOSHIBA506005570.44.0kVPS2501NEC806008070.35.0kVPS2561NEC804008070.35.0kV817(KP1010)COSMO506003560. ...