Lead Inductance and Energy Sharing in Cascaded Surge Protection for an Unenergized DC Interface — MATLAB code and numerical results

Reproducible numerical supplement accompanying the manuscript "Lead Inductance and Energy Sharing in Cascaded Surge Protection for an Unenergized DC Interface" by Md. Zoyheroul Islam and Md. Salah Uddin Yusuf. The manuscript is being prepared for journal submission; this record is the code/data supplement, not a peer-reviewed journal article. Includes MATLAB source, parameters, deterministic case-level results, computational plots and internal numerical checks. The 45 cases are numerical simulations, not experimental measurements. A native MATLAB R2025b Update 2 reproduction on 1 November 2026 matched the supplied case-level outputs and verification tables exactly. See README.md and release_verification.json in the ZIP for reproduction instructions and limitations.