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With a DMM in series with the contactor coil, the current drops from just over an amp down to 0.1 amp when the contactor closes, and stay there.
It says on their website in 'Technical Support' :
"............The problem is easy to avoid; simply don't put anything across the relay coil that will slow down the release time of the relay................because the contacts will usually "tack weld" on the make, and improper coil suppression reduces the coil energy which is needed to break the weld."
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