The TAJE158M004RNJ is a molded tantalum capacitor from the KYOCERA AVX TAJ series, offering 1500 µF capacitance in a 2917 (7343 Metric) surface-mount package with a 4 V rated voltage.
At 125°C, the voltage derating rule for tantalum capacitors typically calls for 50% of rated voltage — so on a 4 V part, the applied DC bias should stay below 2 V to keep the failure rate within the reliability budget.
