Repeated Winding Fusion Can Identify Overcurrent without Establishing Its Circuit Source

What the evidence preview establishes

The repeated fused-wire morphology supported an overcurrent event. Comparison with the control found no wire construction or assembly-quality difference that explained both failures; the current waveform and available circuit margin required further electrical characterization.

Why this case matters

Use repeated fusion morphology to identify the physical damage mode, then compare wire construction and controls before assigning a material defect. Establish the initiating event by measuring the affected signal across the operating range and evaluating current margin and protection response.