15 µF, 20 V — the bulk decoupling anchor
This capacitance-voltage pair fits typical 3.3 V or 5 V rail bulk decoupling where the 20 V rating provides headroom against transients on a 12 V input. ESR is specified at 1.7 Ohm at 100 kHz — this is the AC loss term that governs ripple current handling.
125°C rated life — 2000 hours verified
Derating is standard practice for tantalum capacitors: applying a 50% voltage derating (10 V max applied on a 20 V part) dramatically reduces the failure rate.
