33 µF at 25 V — 300 mOhm ESR drives the decoupling decision
The TPSE336K025R0300: The 300 mOhm ESR is the spec that governs ripple current handling and transient response in a power rail decoupling role. For a 33 µF capacitor at 25 V rated, the ESR sets the self-heating under AC ripple — lower ESR means the part runs cooler and delivers more ripple current before hitting the thermal limit. Molded construction in the TPS series gives a stable, low-profile body that reflows cleanly. The 2917 (7343 Metric) footprint is a standard tantalum case size — the pad layout is shared across multiple vendors, so a second-source swap stays on the same board without a layout change.
Rated for -55°C to 125°C, this capacitor covers the full industrial temperature envelope. At 125°C the derating curve for tantalum caps typically reduces the applied voltage to 50-67% of the 25 V rating — the 300 mOhm ESR helps keep the internal temperature rise low under derated conditions.
Active lifecycle — no EOL risk on this BOM line
Listed as Active by KYOCERA AVX — no discontinuation notice, no last-time-buy window. The E case code is a common footprint in the TPS family — the same 2917 (7343 Metric) pad is shared with other manufacturers' E-case tantalum caps, giving a straightforward second-source path if supply tightens.