The TPSD476K020R0100 is a 47 µF tantalum capacitor rated at 20 V with a 100 mOhm ESR, in the standard 2917 (7343 Metric) molded case from KYOCERA AVX's TPS series. The 100 mOhm ESR is the key figure for power-supply decoupling — it sets the ripple-current handling and the voltage ripple across the capacitor at the switching frequency. A lower ESR means less self-heating and cleaner output rails in a 20 V bus application. The ±10% tolerance is tight enough for bulk decoupling and moderate filtering where the exact capacitance value matters less than the ESR and voltage rating.
Temperature range and deployment context
The molded case in the 2917 footprint is a standard surface-mount tantalum package, so the PCB land pattern is well-established and the part fits into existing layouts without a pad revision.