22 µF, 35 V, 70 mOhm ESR — molded tantalum for power rail decoupling
The TPMD226M035R0070 is a 22 µF molded tantalum capacitor rated at 35 V with a 70 mOhm ESR, housed in the standard 2917 (7343 Metric) D-size case. The 70 mOhm ESR is the key loss parameter for this part — it determines the ripple current the capacitor can handle before self-heating shifts the capacitance and accelerates wear-out. In a 12 V rail to 3.3 V buck converter output filter, that ESR keeps the ripple voltage within a few tens of millivolts at moderate load.
2917 D-size footprint — layout and sourcing note
The 7.30 mm x 4.30 mm footprint with 3.10 mm seated height matches the industry-standard D case. CT is available for prototype or low-volume builds.