Bulk capacitance for 20 V rails
The TPSV157K020R0080: The 80 mΩ ESR is the figure that governs ripple current handling and self-heating — at this impedance, the capacitor can absorb the ripple from a switching regulator without exceeding its internal temperature rise limit. This footprint is common for mid-range tantalum capacitors used in power supply output filtering, DC-DC converter input/output bulk storage, and decoupling on 12 V or 20 V rails where board space is not at a premium.
Temperature range and reliability
Operating from -55°C to 125°C, this capacitor covers the full industrial temperature envelope and the upper end of automotive under-hood ambient. The TPS series is positioned as a general-purpose line, meaning the capacitor is not optimized for low-ESR or high-ripple applications but delivers reliable bulk capacitance at a standard cost point. The 80 mΩ ESR is typical for a 150 µF / 20 V tantalum in this case size — it handles the ripple from a 500 kHz buck converter running at 1-2 A output without excessive heating.
The TR variant is suited for automated pick-and-place assembly; the CT option allows prototype or low-volume builds without committing to a full reel.