The TPSF337K004R0200: The 200 mOhm ESR (Equivalent Series Resistance) is the key parameter for power rail decoupling — it sets the ripple current handling and the self-heating under AC load. A lower ESR means less voltage ripple and lower internal temperature rise for a given ripple current, which directly affects the capacitor's lifetime in the circuit. The ±10% tolerance is standard for tantalum electrolytics and keeps the actual capacitance within a predictable window for filter time constants and decoupling calculations.
Temperature range and deployment context
Rated for -55°C to +125°C operation, this capacitor spans the full industrial temperature range. The TPS series is positioned as a general-purpose tantalum line, not a low-ESR or high-reliability military grade, so it fits cost-sensitive designs where the 200 mOhm ESR is acceptable.
Listed as Active by KYOCERA AVX. No pin-compatible direct replacement is listed — the TPS series has many capacitance/voltage variants, but a BOM change to a different value or voltage rating would require re-verification of the circuit's derating margin.