Current-Sense Shunt Kelvin-Pad Layout & Copper TCR (+3930 ppm/K) Drift Calculator

Deterministic 2D current-crowding potential distribution on SMD 2512/3921 shunt pad + weighted TCR_eff = (R_shunt*TCR_manganin + R_cu*3930ppm)/(R_shunt+R_cu) engine (.gbr, .kicad_pcb, .json) built for Vishay Dale, Bourns, Isabellenhütte, Texas Instruments — zero-upload ephemeral Wasm RAM execution.

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