What the 200 mOhm ESR means for your rail
The TPSE476K035R0200: The 200 mOhm ESR at 35 V and 47 µF sets the ripple current rating and the self-heating under load. In a buck converter output filter, this ESR governs the output ripple voltage — lower ESR means less ripple at the same switching frequency. The E case code is the largest physical size in the TPS series, which allows the 200 mOhm ESR target. A smaller case would push ESR higher for the same capacitance and voltage. This part is sized for power-stage filtering where ESR matters more than board-space savings.
Lifecycle status is Active. This part is safe to specify into a new design today without planning a last-time-buy or a substitute qualification cycle. KYOCERA AVX maintains the TPS series as a standard catalog line. The molded construction and general-purpose feature set mean no special lead times or allocation risk compared to automotive or high-reliability grades.
Temperature range and board integration
Operating from -55°C to 125°C, this tantalum capacitor covers the full industrial temperature envelope and reaches into the under-hood automotive band. The 35 V rating provides 40% derating on a 24 V rail, which is standard practice for tantalum capacitors to avoid surge failures. The land pattern follows the standard EIA-7343 footprint. No thermal pad or exposed paddle — the part relies on the end-cap solder joints for heat sinking. Keep the copper trace width to the pad at least 1.5 mm on each side to conduct heat away under ripple load.