C921U152MVWDBA7317 refers to a KEMET polymer tantalum capacitor with a capacitance of 152µF, a voltage rating of 10V, and case size of 0805. The capacitor is a low-ESR device with a somewhat unusual technology called microvcd Wein-D grading. This process enables KEMET to produce cost-efficient, reliable, and high-performance tantalum capacitors.