The TAJC107K006SNJ is a molded tantalum capacitor from KYOCERA AVX's TAJ series, rated 100 µF at 6.3 V with ±10% tolerance. This is a standard bulk decoupling value for 3.3 V and 1.8 V supply rails, where the 6.3 V rating provides a 2× derating margin against the 3.3 V rail — a common practice to reduce tantalum failure risk from inrush current. The 900 mOhm ESR is typical for a C-case 100 µF tantalum at 100 kHz. For a 3.3 V rail drawing 200 mA ripple, the self-heating from I²R loss stays under 40 mW — well within the case's thermal budget at 85°C ambient.
The molded case construction keeps the capacitance stable down to -55°C, where some conformal-coated tantalums lose 20% of nominal value. At the high end, 125°C is the maximum rated temperature without voltage derating — above 85°C, a 50% voltage derating is recommended per MIL-PRF-55365 guidelines.
For a BOM line that will run for several years, this part does not carry a last-time-buy risk.
C-case 2312 footprint — standard across manufacturers
The 6.00 mm × 3.20 mm C-case (2312 / 6032 Metric) is a JEDEC-standard tantalum footprint shared by KEMET, Vishay, and other major brands. If the BOM calls for a 100 µF 6.3 V tantalum in this case size, the TAJC107K006SNJ is a drop-in replacement for any C-case part with matching capacitance, voltage, and tolerance.