D-case tantalum for 50 V rails — 2.2 µF with a 2.5 Ohm ESR ceiling
This TAJD225M050RNJ is a molded tantalum capacitor from the TAJ series, rated 2.2 µF at 50 V with ±20% tolerance and a maximum ESR of 2.5 Ohm. The 50 V rating gives a 2:1 derating margin on a 24 V supply and a 4:1 margin on a 12 V rail, which is the standard practice for tantalum reliability in power-bus decoupling and hold-up circuits. The D-case (2917 / 7343 Metric) footprint measures 7.30 mm x 4.30 mm with a seated height of 3.10 mm — a common size for medium-density boards where a 2.2 µF/50 V electrolytic would be bulkier.
In an avionics power supply or a downhole sensor module that sees 105 °C ambient, the 125 °C ceiling keeps the leakage current and capacitance drift within the datasheet limits without requiring a separate Hi-Rel screening step. The molded case and surface-mount package (2917) suit automated assembly in sealed enclosures where conformal coating is applied — the case material withstands typical baking profiles up to 125 °C.