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The PWH4012-1R2M1T provides very low impedance energy storage for rails with high di/dt requirements. The metal composite core delivers high saturation margin and controlled inductance behavior under heavy DC bias, while the molded magnetic shielding reduces flux leakage to protect nearby sensitive circuits. This makes it an excellent fit for dense VRM/POL layouts, compute and networking modules, battery discharge paths, and industrial embedded power systems where low-profile construction and sustained current capability are essential.