Hi All, the specifications for a tlp3063 appear to be conflicting. The peak off state voltage is given as 600v. The minimum isolation voltage is given as 5000vrms.
So is the opto going to be damaged when the voltage at the triac side exceeds 600v or 5000vrms? If it was 5000vrms you wouldn't have to worry about voltage spikes damaging it. I blew a opto when turning on a 240vac motor. The motor was not connected to the opto and triac. It was simply connected to the same L and N line of the mains as the resistive load controlled by the opto.
I will try a 275v mov across the motor terminals to see if this will protect the opto. Tried it already across the terminals without the opto circuit connected. It didn't blow or didn't even get warm.
The motor is rated at .43 amps. I connected it through a fast blow 0.5 amp fuse. The fuse didn't blow. This must be because any damaging high voltage inductive spikes are of too short a duration to blow the fuse but still blow optos. and other semiconductors.
Looking forward to receiving your comments.
So is the opto going to be damaged when the voltage at the triac side exceeds 600v or 5000vrms? If it was 5000vrms you wouldn't have to worry about voltage spikes damaging it. I blew a opto when turning on a 240vac motor. The motor was not connected to the opto and triac. It was simply connected to the same L and N line of the mains as the resistive load controlled by the opto.
I will try a 275v mov across the motor terminals to see if this will protect the opto. Tried it already across the terminals without the opto circuit connected. It didn't blow or didn't even get warm.
The motor is rated at .43 amps. I connected it through a fast blow 0.5 amp fuse. The fuse didn't blow. This must be because any damaging high voltage inductive spikes are of too short a duration to blow the fuse but still blow optos. and other semiconductors.
Looking forward to receiving your comments.