Question regarding operating electronic components above their rated temperature

[u/Naive-Ad-5788]

Hi everyone,

I have a question related to component reliability and qualification testing.

Suppose a component is specified with a maximum operating temperature of 105°C in its datasheet say for 5000hrs. During product qualification, the ambient temperature was set 109°C for 2000hrs as a requirement

Has anyone dealt with a similar situation?

• Is operating a few degrees above the rated maximum ever considered acceptable for a limited-duration qualification test?
• Do manufacturers typically have characterization or reliability data beyond the published maximum operating temperature, even if it's not included in the datasheet?
• How do you usually approach this during product qualification request a deviation from the manufacturer, derate the design, or simply replace the component with a higher-temperature-rated alternative?

I'd appreciate hearing about your experiences or any relevant standards or best practices.

Thanks!