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Isocom SMD Optoisolators 1 Channel SO 4 Isocom IS121, The IS121 is an optically coupled isolator with a current transfer ratio of 50 to 600%. The optoisolator consists of an IR LED and NPN silicon phototransistor in a space efficient surface mounting 4 pin package. Ideal for use in computer terminals, industrial systems controllers, measuring instruments, potential and impedance matching in signal transmission systems. Isocom IS121 SMD Optoisolator 1 Channel 50 600% CTR SO 4
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