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Qualifying for Moisture-Containing Environments

Posted by Author on Aug 30, 2016 5:07:33 PM

The purpose of a cyclic THB test is to assess the ability of a product to operate reliably under condensing conditions (dew point). The rationale for more than one cycle is based on observations that repeated applications of temporary condensation events can lead to wearout type behavior ( > 1) over time. Initial condensation events “weaken” the circuit by inducing dissolution of conductor material (in this case, copper). The elevated presence of these metals eventually is sufficient to induce electrochemical migration between insulated conductors.

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Topics: humidity, constant temperature, cyclic temperature

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