Capacitor identity and key parametrics
The TPSY157K006R0040: The 40 mOhm ESR keeps ripple heating manageable in point-of-load decoupling — a bulk cap feeding a 3.3 V rail sees less self-heating than a standard 100 mOhm part at the same ripple current.
Surface-mount package and board-fit
Surface-mount assembly with tape-and-reel packaging (TR) suits high-volume reflow; the molded body resists solder flux ingress better than conformally coated parts. Tolerance is ±10%, tighter than the ±20% common on general-purpose electrolytics — useful when the output ripple spec on a POL converter is tight.