Capacitance and ESR — the key fit parameters
The TPSE477K010R0100 is a 470 µF tantalum capacitor rated at 10 V with a maximum ESR of 100 mOhm. That ESR figure is the primary spec for bulk decoupling and output filtering — it governs ripple current handling and the voltage drop under transient load. A 100 mOhm ESR at 470 µF means this part can absorb and release energy quickly, making it a strong candidate for power rail smoothing in DC-DC converter outputs or as a hold-up capacitor in low-voltage circuits. The ±10% tolerance is standard for tantalum electrolytics and tight enough for most filtering and decoupling roles. For timing or precision RC circuits, the tolerance matters more; here the ESR and capacitance value dominate the selection decision.
This is the standard EIA-7343-31 footprint; the PCB land pattern matches the common tantalum D-size case, so layout reuse across multiple capacitance values in the same series is straightforward. The manufacturer size code is E, which corresponds to the 2917 case.
Temperature range and reliability context
Tantalum capacitors are sensitive to applied voltage at elevated temperatures; the 10 V rating should be derated per AVX application notes (typically 50% derating for best reliability). At 125°C, the leakage current increases, so the ESR and capacitance stability remain within spec if the applied voltage stays below the derated limit. The TPS series is a general-purpose molded tantalum line.