47 µF bulk decoupling with 125 mOhm ESR — the so-what for the BOM
The TPSE476K025R0125: The 125 mOhm ESR is the key figure for a power rail designer: it determines the ripple current the part can handle before self-heating shifts the capacitance. For a 100 kHz buck converter output, the ripple current rating at 125 mOhm is roughly 1.1 A RMS — enough for a 3-5 A rail with typical ripple ratios. The E case (2917 / 7343 Metric) footprint is a standard across the TPS family, so a layout designed for a 47 µF / 25 V TPS part accepts any E-case TPS value without a board spin. The -55 to 125°C operating range means it holds its capacitance and ESR through the full industrial and military temperature band — no derating cliff at 85°C like some commercial tantalums.
Active lifecycle — no LTB clock ticking
No official successor or cross-reference is listed — the TPS series itself is the current mainstream low-ESR tantalum line from this manufacturer.
Molded package and surface-mount integration
The molded case provides consistent dimensions and mechanical protection during reflow and handling. Tape & Reel or Cut Tape packaging suits both high-volume pick-and-place and prototype kitting. The ±10% tolerance is tight enough for bulk decoupling and energy storage — no need to over-spec to a 5% grade for most rail filtering.