MOC3021 is an optically Isolated Triac Driver Device, contains a GaAs infrared emitting diode and a light activated silicon bilateral switch, which functions like a triac. This device is designed for interfacing between electronic controls and power triacs to control resistivity and inductive loads for 115VAC operations.
- High isolation voltages, which is not for AC current. This ability only exists a TRIAC based optocoupler.
- stability of the device is much reliable for any high load.
- Soldering temperature for optocoupler is much high.
- The output pins have the ability to hold the high load at off state which makes it reliable for any switching device at a normal level.