Material Analysis
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PSU Long-term Use Temperature
Problem Phenomenon
[Problem Phenomenon] PSU parts degrade in performance faster than expected under long-term high-temperature conditions
Cause Analysis
PSU mechanical and electrical properties can be maintained up to about 175°C, Tg 185-190°C; long-term operation near the upper limit accelerates creep and aging; selection must leave margin
Solution
Control long-term operating temperature below 175°C with design margin; evaluate PESU (200°C) or PEI for over-temperature situations; regularly test performance degradation
Key Takeaway
175°C is the PSU long-term performance line; over-temperature service requires switching to PESU or PEI; After confirming effectiveness, solidify the parameters and practices into the work instructions to prevent recurrence
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