The PS2805-1-F3-A with Transistor Output Optocouplers Optocoupler 4-pin SSOP is a semiconductor device manufactured by Renesas. This optocoupler is composed of an infrared emitting diode and an NPN transistor output and provides an integrated withdrawal insulation between the input circuitry and the output by using a light, as opposed to an electrical signal, for coupling.It has wide Peak Off State Voltage Operating Range: 80 V and has a It has a current Transfer Ratio (CTR) greater than 50% minimum. Its insulation resistance is greater than 100Meg Ohm. It's PC Board mounted and is 5mm wide and has a built-in internal shielding. This optocoupler provides secure isolation for driving I/O or audible alarms from transmission systems, adjustable home appliances, and other peripherals.