The TAJC336K006RNJ is a 33 µF, 6.3 V molded tantalum capacitor from the KYOCERA AVX TAJ series, in a C case (2312 / 6032 metric) surface-mount package. It carries a ±10% tolerance and operates from -55°C to 125°C — that full military temp range means it holds capacitance and ESR stable in avionics, downhole tools, or outdoor base stations where the board sees -40°C startup and 105°C running.
This is a production part that can be designed into new builds without a migration plan.
The C case measures 6.00 mm x 3.20 mm with a seated height of 2.80 mm max — a common footprint shared across many 33 µF tantalum caps, so the PCB land pattern is standard and the BOM position is unlikely to need a layout change if you swap suppliers.