What is this part and where does it go?
The TPSA154M050R9000: This is a molded tantalum capacitor from KYOCERA AVX's TPS series, rated 0.15 µF at 50 V with ±20% tolerance.
Sourcing and lifecycle — no rush, no panic
Lifecycle status is Active — no EOL notice, no last-time-buy window. You can design it into a new BOM today and expect it to be available for the production run.
The 9 Ohm ESR (Equivalent Series Resistance) is the spec that matters for ripple handling — it tells you how much the cap heats up under AC current. For a 0.15 µF cap at 50 V, this ESR is typical for the size code A package; keep the ripple current below the self-heating limit in the datasheet. With a 50 V rated voltage, you have comfortable headroom on common rails like 12 V, 24 V, or even 48 V. A good rule of thumb is to derate to 80% of rated voltage for long-term reliability — that gives you 40 V working voltage, which still covers most industrial and automotive auxiliary supplies.