My name is Mike Cubon and I work for ITW Chronomatic. We manufacture Polymer
Thick Film circuits and I have a technical question about figure 3-4 in
IPC-D-275. There are three graphs that show current rating for different
conductor traces at different temperatures. Are there any charts or perhaps
a formula for calculating current capacity below the temperatures shown. The
application is automotive and will be tested to -40C. The max. current will
be 300mA and trace width will be .012 inches.

Any help is greatly appr.

Mike

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