The 1N5615US is a Zener diode manufactured by Microchip. It is a type of diode used to regulate a current or voltage. It allows current to flow in one direction while blocking current in the opposite direction until a certain reverse voltage is reached. The 1N5615US has a voltage rating of 15V and a power rating of 500mW. Its maximum current is 100mA and its reverse breakdown voltage is 5.2V. Its operating temperature range is -65°C to +175°C.