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Transistor Output Optoisolators Isocom 4N25, A transistor output optoisolator with a 20% CTR. Comprised of a gallium arsenide infra red emitting diode and NPN silicon phototransistor. Used in DC motor controllers, industrial system controllers, measuring instruments and signal transmission between systems of different potentials and impedances. Isocom 4N25 Transistor Optoisolator 20% Ctr
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