Capacitance, voltage, and ESR — the three numbers that size the part
The TAJW335K035RNJ: 3.3 µF at 35 V with a 1.6 Ohm ESR — this is a general-purpose molded tantalum from the TAJ series, built for bulk decoupling and filtering where you need stable capacitance over temperature and a known AC loss. The 35 V rating gives headroom on a 12 V or 24 V rail — a 50 % derating rule of thumb still leaves 17.5 V of margin, which covers most switching ripple and transient spikes without pushing the cap into its wear-out region.