Molded tantalum cap for tight thermal budgets
The TAJB225K020H is a molded tantalum capacitor from the TAJ series by KYOCERA AVX, rated at 2.2 µF with ±10% tolerance and 20 V DC. The 3.5 Ohm ESR is the figure that matters most for ripple handling in a switching supply — a higher ESR means more self-heating and less ripple current capacity, so this part fits low-to-moderate ripple applications like decoupling or hold-up caps on a 12 V rail.
A 125°C ceiling means it can sit next to a hot power component or inside an engine-bay ECU without derating the voltage — just confirm the applied DC bias stays below 20 V at the high end, because tantalum caps lose margin as temperature rises.