In the AEC-Q200 certification for automotive-grade common mode inductors, what are the specific conditions for temperature cycling testing?

The strict definition of AEC-Q200 for temperature cycling is as follows:

Standard cycling conditions:

Temperature range: typically -40°C to +125°C (some tests extend to -55°C to +150°C); Conversion rate: ≤15°C/min ramp rate (to avoid thermal stress impact); Dwell time: 30 minutes to 2 hours at each end of high and low temperatures (to verify extreme environmental adaptability); Cycle count: typically 1000 cycles (to verify long-term thermal fatigue reliability); Test purpose: to evaluate material expansion coefficient matching, solder joint reliability, and magnetic core stability, preventing cracking or performance drift during high and low temperature switching; Other stages: may be combined with humidity cycling (HAST test) or power cycling to comprehensively cover automotive environmental challenges.