IPC Class II and Class III reliability| 8 April, 2003
MTBF is hard to nail down raw data based on whether or not it is classified as IPC CII or CIII alone. Given that most failures are environmentally based, you might be able to get this data for CII and CIII in similar environmental testing situations, but this data will no doubtly change when you change the test. Can you be a little more specific in what or how the reliability of the boards are being tested.
IPC Class II and Class III reliability| 9 April, 2003
MA/NY DDave, I'll take your money. I'm betting on the Class II, whatever that is, because: * Solder is the same. * Board is the same from a fabrication and probably materials standpoint. * Components are the same. * Processing is the same.
... but the end-use environment is more demanding for the Class III. I say, Class III curls-up and pleads for mercy under the unwithering pressure of 0 to 100, 15 minute dwell.