MCP4131-503E/P 50K Digital POT with Volatile Memory - 8 DIP- Microchip
The MCP41/42XX devices are non-volatile, 7-bit (129 wiper steps) digital potentiometers that are programmed/reprogrammed through an SPI compatible interface.
The MCP41/42XX devices offer a variety of configurations simplifying design while minimizing cost, package size and pin count.
503E/P Implies that it is a 50K Potentiometer.
It has an internal non volatile memory which is used to recall the wiper settings.