The TPSC156K020H0400 is a molded tantalum capacitor from the KYOCERA AVX TPS series, rated 15 µF at 20 V with a 400 mOhm ESR. This combination covers 3.3 V, 5 V, and 12 V power rails with derating margin — a common value for input/output filter caps on DC-DC converters or bulk decoupling on a mixed-voltage board. The 400 mOhm ESR is the parametric that drives ripple current capability and self-heating.
Full military temperature band — avionics and downhole ready
The molded case (size code C, 6.00 mm x 3.20 mm footprint) handles the thermal expansion without cracking the dielectric.
Active lifecycle — no obsolescence scramble
No last-time-buy window to track — this cap is a standard catalog item from KYOCERA AVX. The TPS series is a mature, widely used line, so date-code consistency across reels is straightforward to maintain.