High-performance computing requires efficient, compact 48 V point-of-load converters, whose volume is largely dominated by passive components. Class II MLCCs offer high volumetric capacitance density but exhibit strong DC-bias derating, making bias-aware device selection essential. This work compiles and evaluates commercially available MLCCs under DC bias, identifying top-performing options for 48 V converter design. Comparative measurements under controlled frequency, AC excitation, and DC bias complement manufacturer C(V_B) data and quantify the gap between specified and effective capacitance. The resulting shortlist helps designers maximize capacitance density within their operating range. The analysis reveals a consistent decline in capacitance density with increasing bias and a shift toward larger packages. Applied to a discrete 48 V 4:1 Dickson converter, the method reduces passive volume by 88.5% while maintaining equivalent capacitance under bias, demonstrating its practical utility. The full dataset is made publicly available.
