220 µF at 10 V with 150 mOhm ESR — bulk decoupling for power rails
The TPSE227K010R0150 is a 220 µF tantalum capacitor rated at 10 V with a 150 mOhm ESR, housed in the standard 2917 (7343 Metric) molded case. That ESR figure is the key parameter for supply-rail filtering: at 150 mOhm, the capacitor's self-heating under ripple current stays manageable, and the voltage drop during transient load steps is dominated by the ESR rather than the capacitance alone. The ±10% tolerance on the 220 µF value is tight enough for most bulk decoupling roles — the capacitance spread across temperature and DC bias will dominate the tolerance band anyway. The E case code (4.3 mm seated height) fits the standard low-profile tantalum footprint used across many power-stage layouts.
Temperature range and operating environment
The molded construction keeps the mechanical integrity through thermal cycling — the epoxy case resists cracking from board flex and temperature swings better than conformal-coated chips. Running a tantalum at less than half its rated voltage is standard practice for reliability.