22 µF, 6.3 V, 375 mOhm ESR — TPS series molded tantalum
The TPSB226K006R0375 is a 22 µF molded tantalum capacitor from KYOCERA AVX's TPS series, rated at 6.3 V with a ±10% tolerance. The 375 mOhm ESR (Equivalent Series Resistance) is the key parameter for estimating ripple current handling and self-heating in power-supply decoupling — lower ESR means less internal temperature rise for a given ripple current, which directly affects reliability in a tight thermal budget.
That makes it a fit for avionics, downhole instrumentation, satellite power rails, and outdoor telecom equipment where the ambient temperature can swing from a cold soak to a hot enclosure. The molded case (1411 / 3528 Metric) provides mechanical stability and moisture resistance in those environments.