0.15 µF at 50 V in a 1411 mold — decoupling or timing in a wide-temp board
The TAJB154K050RNJ: 0.15 µF capacitance at a 50 V rated voltage in a molded 1411 (3528 Metric) case — this is a small-value tantalum for decoupling a quiet rail or setting an RC time constant where the board sees temperature swings from -55 to 125 °C. The 17 Ohm ESR is the thermal limiter: at 50 V and 0.15 µF, the ripple current capability is modest, so this part is better suited for bypass or timing than for bulk output filtering where ripple current would heat the dielectric. Part of the TAJ series — a general-purpose molded line that covers a wide capacitance-voltage matrix in a standard footprint.