What the 200 mOhm ESR means for your rail
The TPSD336K035R0200: The 200 mOhm equivalent series resistance (ESR) is the dominant term in the ripple voltage calculation for this 33 µF tantalum capacitor. At 100 kHz switching frequency, the impedance drops to roughly 50 mOhm from the capacitance alone, so the ESR sets the floor on how much ripple the capacitor can absorb before the voltage ripple exceeds the downstream regulator's input tolerance. For a 1 A ripple current, the self-heating from 200 mOhm ESR is 200 mW — well within the D-case power dissipation rating, but the temperature rise adds to the ambient and reduces the voltage derating margin. The 35 V rating gives 1.4× headroom on a 24 V rail, which is the standard derating factor for tantalum capacitors in industrial environments.
D-case footprint and board integration
The molded case provides mechanical protection during pick-and-place and reflow, with no exposed anode or cathode edges that could short to adjacent components. Operating temperature spans -55°C to 125°C, covering the full industrial range and most automotive underhood applications. The molded construction handles the thermal cycling without cracking the dielectric, which is a known failure mode in conformally coated tantalum capacitors under repeated temperature swings.
Active lifecycle and supply posture
The TPS series is a general-purpose, low-ESR tantalum platform.