PT support, light receptor and photoelectric coupler

An embodiment of the utility model provides a PT support, a light receiver and a photoelectric coupler, the PT support comprises a first base island, a second base island and a third base island, the first base island is provided with a die bonding area used for placing a PT chip, a first welding area used for welding one end of a resistor, and a second welding area used for welding one end of a capacitor; the second base island is provided with a third welding area for welding the other end of the resistor; the third base island is provided with a fourth welding area used for welding the other end of the capacitor. According to the technical scheme of the embodiment of the utility model, the soldering areas capable of being soldered are additionally arranged on the three base islands, and an internal RC circuit with strong anti-interference capability is formed through the connection of internal components, namely the resistor and the capacitor, so that the compatibility problem of the silicon controlled rec