The TAJC155M050RNJ is a molded tantalum capacitor from the KYOCERA AVX TAJ series, rated 1.5 µF at 50 V with ±20% tolerance. The 50 V rating gives you headroom for a 24 V or 48 V rail — derating to 80 % (40 V) is standard practice for tantalum reliability, which this part still clears. The 4.5 Ohm ESR limits ripple current to roughly 330 mA RMS at 85 °C; above that, self-heating accelerates aging. This is a general-purpose part, not a low-ESR or automotive-grade device.
The molded case handles the thermal cycling without cracking — a common failure mode in conformally coated boards that see rapid temperature changes.
Package and mounting — 2312 case
The 2312 (6032 Metric) case measures 6.00 mm x 3.20 mm with a seated height of 2.80 mm. This is a standard molded tantalum footprint — compatible with reflow soldering and common pick-and-place nozzles.
That means it is safe for new designs and repeat orders.