POSCAP polymer in a power-rail decoupling role
The 4TPB68M is Panasonic's POSCAP TPB molded polymer capacitor at 68 µF / 4 V in the 1411 (3528 metric) SMD case — the size code confirms that footprint. Polymer construction gives it a rated ESR of 70 mΩ measured at 100 kHz, which is the critical figure for high-frequency decoupling on cores, PLLs, and sensitive analog rails where a bulk ceramic or electrolytic would add too much impedance at switching transients.
Footprint, packaging, and what the ±20% tolerance means
It ships on tape-and-reel for automated placement and also on cut tape for low-volume prototyping runs. The capacitance tolerance is ±20%, which is normal for polymer bulk capacitors and means the part is sized for hold-up and decoupling rather than precision filtering — you pick up the 68 µF nominal and absorb the spread across temperature and bias.