Parametric fit — ESR is the deciding spec
The TPSE156K050R0250: Rated 15 µF at 50 V with ±10% tolerance, this molded tantalum carries a 250 mOhm ESR (Equivalent Series Resistance). For a decoupling or output filter cap, the ESR governs ripple voltage and self-heating — 250 mOhm is a middle-of-the-road figure for a 2917-size tantalum at this voltage rating. If your circuit needs lower ESR for high-ripple applications, you would step to a polymer or multi-anode part; for general-purpose bulk storage, this is a solid fit.
The molded construction gives consistent dimensional control for pick-and-place, and the standard footprint mates with common reflow profiles.