Thermal modeling challenges for multilayer ceramic capacitors (MLCCs) in high power density assemblies were examined. Finite element modeling and experimental testing were used to analyze the thermal resistance of individual MLCCs and stacks of MLCCs. Key findings include: 1) MLCCs oriented with inner electrodes perpendicular to the board had lower heat dissipation compared to the traditional parallel orientation. 2) Thermal resistance of individual MLCCs and stacks decreased when using the low loss orientation compared to the traditional orientation. 3) The interconnect between MLCCs in stacks increased thermal and electrical resistance as more MLCCs were added in the traditional orientation. 4) Further modeling will compare transient thermal response to measurements and