■ Features
1. NO.5 pin completely sealed in the mold for
   external noise resistance
2. Built-in zero-cross circuit (S21MD4TV)
3. High repetitive peak OFF-state voltage.
   S11MD5T VDRM : MIN. 400V
   S21MD3TV/S21MD4TV VDRM : MIN. 600V
4. Isolation voltage between input and output
( Viso : 5 000 Vrms )
5. Recognized by UL : recognized, file No. E64380

■ Applications
1. For triggering of power triac