Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

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Allowable ramp rate

#18467

Allowable ramp rate | 18 December, 2001

What is the maximum allowable thermal ramp rate for wave solder. We have a "short" machine used for selective soldering. To get the boards up to temp, we need to exceed our normal 2�C/sec. Are there any IPC documents governing this process? Anyone know of any components that could not exceed the 2�C/sec?

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#18469

Allowable ramp rate | 18 December, 2001

J-STD-001 - Requirements For Soldered Electrical & Electronis Assemblies is the governing document. It defines no specific limits like you mention. It states words to the effect that preheating should not do bad things.

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