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    The only way I could get the triac to fire was to use a capacitor and diac on the output of the moc3023 I have no problems with the zero crossing moc3043 triac opto coupler and the recommended Fairchild circuit with the BT138X-600E
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    Triac failures are usually caused by either excess current or excess voltage, either to the gate or through the device, and if they happen at the moment of turn on application it is most likely not overheating
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