Built-in Zero-cross Circuit, High Noise Resistance Type Phototriac Coupler

❈Lead forming type of S21MD4V is also available. (S21MD4W)
❈❈TUV (DIN-VDE0884)approved type is also available as an option.

■Features
1. Built-in zero-cross circuit
2. High critical rate of rise of OFF-state volt-
    age (dV/dt : MIN. 100V/µs)
3. High repetitive peak OFF-state voltage
   (VDRM : MIN. 600V)
4. Isolation voltage between input and output
    Viso : 5 000Vrms
5. UL recognized, file No. E64380 (S21MD4V/S21MD4W)
❈ S21MD4V is for 200V line

■Applications
1. For triggering medium/high power triac