Application‑level Rectifier for Electrolyser in Green Hydrogen segmentation isolates four dominant end‑uses: Power Generation, Industrial Hydrogen Production, Transportation, and Energy Storage. Power Generation, encompassing grid‑linked renewable farms that feed electrolyser loads, represents the largest slice at 40 %, reflecting the scale of utility‑driven green hydrogen strategies. Industrial Hydrogen Production—primarily for refining, ammonia synthesis, and steelmaking—accounts for 35 %, as these sectors prioritize steady, high‑volume output and integrate rectifiers with large‑capacity PEM or alkaline electrolyser stacks. Transportation applications, including fueling stations for fuel‑cell vehicles, contribute 15 %, driven by emerging mobility policies and the need for on‑site hydrogen generation. Energy Storage, which couples electrolyser systems with renewable intermittency buffering, holds the remaining 10 %, reflecting early‑stage deployments where rectifiers enable load shifting and grid services. This application taxonomy directly informs market sizing, as each segment’s capital intensity, regulatory incentives, and demand elasticity dictate distinct growth trajectories within the green hydrogen ecosystem.