The SI2310 is a MOSFET N Trench Field Effect Transistor (FET) manufactured by PUOLOP. It features a 20V rating, 5A current, 800mV at 250uA voltage, 28mOhm at 5A resistance, 4.5V SOT23 package, and is RoHS certified. It is used in high speed, low voltage switching, level shifting, voltage regulation, and as a battery backup switch.