Bulk decoupling fit for a 16 V rail
The TPSD476M016R0150: This combination targets bulk decoupling on a 12 V or lower-voltage rail where the 16 V rating provides the recommended 50% derating margin against surge and ripple. The 150 mΩ ESR limits the ripple current heating and keeps the capacitor within its thermal budget in a switching regulator output filter or a point-of-load decoupling bank. A lower ESR would handle more ripple; this value is typical for a standard D-case tantalum at this capacitance and voltage rating.
Temperature range and derating discipline
At the high end, the leakage current and ESR both rise; the 16 V rated voltage should be derated to 10 V or less in a 125°C ambient to avoid field-failure risk from voltage derating rules for solid tantalum capacitors. The ±20% tolerance is standard for tantalum electrolytics. For a filter pole or timing circuit where capacitance accuracy matters, the spread from 37.6 µF to 56.4 µF must be budgeted. For bulk decoupling, the tolerance is rarely the limiting factor — the ESR and voltage rating govern the fit.
Active production with no end-of-life pressure
The molded D-case construction (EIA 2917 / metric 7343) is a widely used footprint shared across multiple AVX series and competitor tantalum lines. If a second-source need arises, the footprint and key ratings (47 µF, 16 V, 150 mΩ ESR) are a common parametric match point.