In order to standardize results and to be able to compare one thermal
switch to another, the industry has adopted a standard rate of
temperature change which ranges from 0.25°C to 1.0°C change per minute.
The larger and the more thermally resistive the package the slower the
temperature rise rate must be. After the rise from room temperature a
10 – 15 minute soak at the lower threshold of the published range of
operation is required in order to allow temperatures to stabilize.
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