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 --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------