In the home, power phototriacs are found in microwaves, room-air conditioners, and refrigerators. Any device that has a small motor or blower that is attached to the AC power line is a good candidate for a power phototriac. Most home appliances feature a low voltage, control panel interface that should be optically isolated to not only protect the electronics but to also protect the customer. For example, the room air conditioner has an interface panel used to set the temperature and motor speed while the motor itself is driven directly off the AC main. A low, 10 mA trigger current from the control circuit can be used to directly switch on the phototriac. For industrial applications, power phototriacs are used to turn on and off motors or heaters up to 44W at 220V, and 22W at 110 V. They can also be used to control solenoids and valves.