15 µF at 20 V with 450 mOhm ESR floor
The TPSC156M020R0450 is a molded tantalum capacitor from the KYOCERA AVX TPS series, rated 15 µF ±20% at 20 V. The 450 mOhm ESR is the dominant loss term — it sets the ripple current capability and self-heating under AC load, which is the first check for a bulk decoupling or output filter role on a 12 V rail.
Rated for -55 to 125 °C, this cap covers the full military temperature band — avionics, downhole instrumentation, and outdoor telecom enclosures where the ambient swings well past commercial limits. The 2312 (6032 Metric) case is a standard footprint; the molded body reflows cleanly with a typical 260 °C peak profile.
The TPS series is a broad tantalum line; if a lower ESR is needed, the sibling TPSC156M020R0300 (300 mOhm) is a direct footprint swap, but the 450 mOhm variant is the standard-grade option.