Quote:
Originally Posted by philso
In normal operation, those transorbs have less than 100 nanoAmps flowing through them and are essentially out of circuit. The energy present in a standard ESD test, like the ones referred to in the datasheet linked by Mr. Copioli would not contain enough energy to cause the temperature of the transorb to rise that much. It would not pass those tests if it did.
Transorbs are a pretty rugged class of devices. I have severely abused similar devices by applying surge voltage test with much higher energy than the ESD test (several 100 x), without allowing the required cool down times and the transorbs worked properly up till the heat dissipated in them melted the solder and the part fell off the board. They continued to work after we soldered the parts back in the board.
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I'm not saying the temperature rose due to ESD. My guess is that the robot had been running prior to the event and heated up.