SemiconductorOR-357C with Optocouplers SMD-4 RoHS is a 4-channel phototransistor optocoupler manufactured by Orient Semiconductor. The OR-357C is encapsulated in a compact, low profile, surface-mount package, making it suitable for use in space-constrained applications. The optocoupler offers extremely high input-to-output isolation voltages, excellent temperature stability, and very fast rise/fall times. It is RoHS compliant and has an operating temperature range of 0°C to +80°C. This Optocoupler delivers consistent performance over a wide variety of voltage swings and is ideally suited for industrial and commercial applications.