1000 µF at 4 V — bulk storage for low-voltage rails
The TPMV108K004R0018 is a molded tantalum capacitor from KYOCERA AVX's TPM series, delivering 1000 µF capacitance at 4 V rated voltage in a 2924 (7361 Metric) surface-mount package. The 18 mOhm ESR keeps self-heating low under ripple current — a critical parameter for output filtering where the capacitor's own dissipation can dominate the thermal budget.
18 mOhm ESR — the parametric that drives the fit
At 1000 µF and 4 V, the 18 mOhm ESR is the figure that determines ripple-current capability and voltage ripple on the output rail — a lower ESR means the capacitor can absorb more AC current before reaching its self-heating limit. The ±10% tolerance on capacitance is standard for tantalum electrolytics; the actual capacitance at the operating bias voltage will be lower than the nominal, so the design should account for the DC bias derating typical of tantalum dielectrics.
The 2924 footprint is a common size for high-capacitance tantalum parts; confirm the pad geometry matches the 7.30 mm x 6.10 mm body with 3.75 mm seated height.