The TPSY336K025R0200: That ESR figure is the key to its fit: at 200 mOhm, it handles ripple current better than a higher-ESR part of the same capacitance — for a 100 kHz switcher supplying 1 A ripple, the self-heating stays under 0.2 W, which keeps the core temperature within the -55 to 125 °C operating band.
Case code Y and the 2917 footprint
The Y case is a standard for this capacitance and voltage combination; the 200 mOhm ESR is consistent with the Y case's internal construction, giving a predictable ripple current rating for the layout engineer's thermal simulation.
Active production — quoted to order
The TPS series is a mature molded tantalum line, so date code continuity is straightforward for production builds.