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The PWH4012-220M1T uses a metal-composite magnetic core with a molded, magnetically shielded construction to minimize flux leakage and EMI while maintaining inductance stability under DC bias. The metal material core delivers low core loss and strong saturation margin, enabling predictable ripple current control and consistent power-rail behavior across load and temperature. Its low-profile 4.0×4.0×1.2mm form factor supports dense layouts in compact DC-DC modules, telecom power rails, industrial embedded supplies, and battery-powered electronics where height is limited but long-term reliability and thermal stability are required.