Case 2026 ยท Public preview
Local Board Flexure Can Repeatedly Fracture One Ferrite-Bead Location
Ferrite beads repeatedly developed anomalous resistance at one circuit-board location while neighboring beads remained functional.
Electrical testingOptical microscopyMicrosectioningSEMEDSLocation comparison
What the evidence preview establishes
The ferrite beads failed through mechanical flexure associated with loading from an adjacent spring. Repetition at one board location, the local board geometry, and consistent fracture orientation supported a design-driven stress condition rather than a component or soldering defect.
Why this case matters
When only one ceramic-component location repeatedly fails, investigate local mechanics before blaming the part. Map external loads, board thickness, edge proximity, and fracture opening direction, then reduce strain at the component site.
Full evidence reserved for MEMBER and STOREThe complete case includes the evidence sequence, four interpreted figures, alternative explanations, limitations, and practical application guidance.