IL420 ZERO CROSSING TRIAC COUPLER VISHAY OPTOCOUPLER

• High input sensitivity IFT = 2.0 mA
• 600/800 V blocking voltage
• 300 mA on-state current
• High static dV/dt 10 kV/μs
• Inverse parallel SCRs provide commutating
  dV/dt > 10 kV/μs
• Very low leakage < 10 μA
• Isolation Test Voltage 5300 VRMS
• Small 6-pin DIP package
• Lead-free component
• Component in accordance to RoHS 2002/95/EC
  and WEEE 2002/96/EC

The IL420 used two discrete SCRs resulting in a commutating dV/dt of greater than 10 k/μs. The use of a proprietary dV/dt clam results in a static dV/ dt of greater than 10 kV/μs. This clamp circuit has a MOSFET that is enhanced when high dV/dt spikes occur between MT1 and MT2 of the TRIAC. When conducting, the FET clamps the base of the phototransistors, disabling the firs stage SCR predriver The 600/800 V blocking voltage permits control of offline voltages up to 240 VAC, with a safety factor of more than two, and is sufficient for as much as 380 VAC. The IL420/ IL4208 isolates low-voltage logic from 120, 240, and 380 VAC lines to control resistive, inductive, or capacitive loads including motors, solenoids, high current thyristors or TRIAC and relays.