What AEC-Q200 Actually Certifies
What is AEC-Q200? A stress-test qualification for passive parts, not a spec upgrade. 34,531 Walsin resistor pairs differ only by one letter in the code.
October 3, 2026
What is AEC-Q200? A stress-test qualification for passive parts, not a spec upgrade. 34,531 Walsin resistor pairs differ only by one letter in the code.
Walsin specifies MLCC storage at 5-40 C, 20-70% RH and use within 12 months of receipt, plus drop, stacking, transport and altitude limits. Full checklist.
The whole Walsin RF front end is 9 antenna switches, 5 BAW and 3 SAW parts, against 235 LTCC filters and 116 multiplexers. Every part, listed and counted.
Venatech holds 93,914 Walsin thin film resistor parts in WF, MF and SF. Nine of Walsin’s twenty thin film exports return zero rows. Here is what exists.
A real rf matching inductor shortlist from Walsin data: 1,321 of 5,410 parts meet Q min 30+ and tolerance 5% or tighter, concentrated in five sizes.
A Walsin cross reference works the same in Chinese as English: the part number is pure ASCII. Zero of 360,078 part numbers carry a Chinese character.
A Vishay thin film alternative at series level: Walsin’s tightest TCR, ±3 ppm/°C, exists at only 4 of 8 WF sizes. No Walsin thin film datasheet is held.
A Yageo resistor cross reference method: one 0603 1 kΩ ±5% line resolves to 32 real Walsin parts across 6 series groups, not one.
A TDK mlcc alternative at series level: 93.5% of Walsin’s AEC-Q200 MLCC part numbers share their five-field spec with a non-qualified part.
A Samsung MLCC cross reference at series level: 16 Walsin series, a 399-part duplicate defect in Walsin’s own export, and a blank column for your part.