we are using moc3021 in lightening application as zero cross detector.
intitially the series resistor is getting burnt with 1/4w. if resistor is increased triac on delay is observed, so with lower value and 1/2w resistor is not getting burnt but moc is getting failed when dimming of light in long run.(not getting failed immediately). i think moc3081 can be used instead moc3021. kindly help in this regard.and also pls sujject the circuit.