Transistor-Output-Optoisolators-Isocom-4N25X-U-P-Industry-standard-4N25-optoisolator-from-Isocom-comprising-a-Gallium-Arsenide-infra-red-emitting-diode-&-NPN-silicon-phototransistor-P-Suitable-for-use-in-DC-motor-controllers-industrial-system-controllers-measuring-instruments-&-signal-transmission-between-systems-of-different-potentials-&-impedances-P-P-Isocom-4N25X-U-Transistor-Optoisolator-20-Ctr