The TPSB107M006R0250: This is a 100 µF tantalum capacitor rated at 6.3 V DC, ±20% tolerance, in a molded 1411 (3528 Metric) surface-mount case. The 6.3 V rating means it fits a 3.3 V or 5 V rail with healthy derating — standard practice for tantalum is to stay below 80% of rated voltage to avoid surge failures.
250 mOhm ESR — general-purpose, not low-impedance
The equivalent series resistance is 250 mOhm. That is a middle-of-the-road value for a 100 µF tantalum in this case size — it handles moderate ripple but is not the right choice for a switching regulator output where sub-100 mOhm ESR is needed to keep output ripple low. Use it for bulk decoupling, RC timing, or input filtering where the ripple current stays under a few hundred mA.
The molded construction keeps the case sealed against moisture and vibration better than a dipped tantalum.