Bulk decoupling on a 25 V rail — what the ESR tells you
The TPSD476K025R0250: At 47 µF and 25 V rated, this TPS-series tantalum fits bulk decoupling or output filtering on a 24 V bus with margin. That is a solid fit for a 1-2 A buck output where the inductor ripple is 30-40% of load current. The D-case (2917 / 7343 metric) footprint is the standard large-body tantalum package — 7.30 x 4.30 mm with a 3.10 mm seated height. It takes the same PCB land pattern as the common 7343-31 case code, so a layout already using a 47 µF/25 V tantalum from another vendor should accept this without a board spin.
Temperature range and operating life
Rated -55 to +125°C, the TPSD476K025R0250 covers the full industrial temperature band and the underhood automotive ambient. At 125°C the rated voltage derates to two-thirds of 25 V per typical tantalum practice — about 16.7 V — so a 12 V rail is safe, but a 24 V rail at 125°C exceeds the derated limit. The molded case carries no hermetic seal — this is a standard commercial/industrial-grade tantalum, not a wet or Hi-Rel military type. For high-reliability or long-life applications, review the surge current test conditions in the full TPS series datasheet; the molded construction has lower surge capability than the hermetic equivalent.
Active production — no EOL watch needed
Tolerance is ±10% — the standard grade for tantalum. No tighter binning, so the BOM position does not require premium screening. The ±10% band covers the full -55 to +125°C range; capacitance drift with temperature and voltage is typical for MnO₂ tantalum (roughly -10% at -55°C, +15% at +125°C relative to the 25°C value).