S21MS3 coupler equivalent, high density surface mount type mini-flat package phototriac coupler.
1. Ultra-compact, mini-flat package type ( 3.6 x 4.4 x 2.0mm ) 2. Built-in zero-cross circuit ( S21MS4 ) 3. High isolation voltage between input and output ( Viso : 3 750.
1. For triggering of medium/high power triacs
5 No external connection 6 Anode/ cathode
g Zero-cross circuit for S21MS.
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