220 µF, 16 V, 200 mOhm ESR — TPS series molded tantalum
The TPSD227M016R0200V: ESR is specified at 200 mOhm at 100 kHz — the dominant loss term in a switching regulator output filter, where the ripple current heats the capacitor and the ESR sets the output voltage ripple amplitude.
Temperature rating and rework considerations
Pin 1 polarity is marked by a band on the top face — visible after reflow if the part is placed correctly. No orientation mark on the bottom; the cathode end is the chamfered side of the molded body.
