33 µF at 25 V — the bulk decoupling workhorse in a D case
The KYOCERA AVX TPSD336M025R0100 is a molded tantalum capacitor delivering 33 µF at 25 V rated voltage in the standard D case (2917 / 7343 Metric footprint). The 100 mOhm ESR is the spec that governs ripple current handling and transient response — lower ESR means less self-heating and better filtering of high-frequency load steps on a 25 V rail. Operating from -55°C to 125°C, this part sits comfortably in industrial control, telecom base stations, and power supply output stages where the ambient temperature inside the enclosure can push past 85°C.
ESR and derating — what the 100 mOhm rating means for the rail
At 100 mOhm ESR, the capacitor dissipates I²R heat proportional to the ripple current squared — for a 1 A ripple, that is 100 mW of self-heating, which raises the internal temperature and accelerates aging if the ambient is already near the 125°C ceiling. The ±20% tolerance is standard for tantalum electrolytics; the actual capacitance at 25 V bias will measure between 26.4 µF and 39.6 µF, so the decoupling design must work with the lower end.
Active production — sourcing against the BOM line
The D case (2917) and Tape & Reel packaging mean it feeds directly into a standard pick-and-place line with no manual handling step.