MELODY's 5 PCS MOC-3021 DIP 6 Random - Phase OPTO ISOLATORS TRIAC Driver Output Micro Controller Board Electronic Hobby Kit

MOC3021 is an opto-coupler designed for triggering TRIACS. By using this we can trigger anywhere in the cycle, so can call them as non-zero opto-coupler. MOC3021 are very widely used and can be quite easily obtained from many sources.’ Use this popular optocoupler triac driver to drive triacs from a low voltage signal with complete isolation between the low voltage and the high voltage source.