ESR and tolerance — what the 40 mOhm and ±20% mean for your rail
The TPSV477M006R0040: The 40 mOhm ESR is the dominant parameter for this part: it defines the capacitor's ripple current capability and the self-heating under AC load. For a 470 µF tantalum at 6.3 V, 40 mOhm is a low-ESR grade — expect ripple current ratings in the 2-3 A range at 100 kHz, making it suitable for switching regulator output filtering where the inductor ripple current needs a low-impedance sink. The ±20% tolerance is standard for tantalum electrolytics; the actual capacitance at 6.3 V will sit between 376 µF and 564 µF. Voltage derating is recommended — running at 50% of rated voltage (3.15 V or less) significantly reduces the failure rate in high-reliability applications, as tantalum capacitors are sensitive to voltage surge and inrush current.
Tape & Reel — ordering for pick-and-place volume
Supplied on Tape & Reel (TR), the TPSV477M006R0040 is packaged for automated surface-mount assembly. The reel quantity is typically 500 or 1000 pieces per reel for the 2924 case size — confirm the exact reel count at quote time. The molded case construction provides good mechanical stability during reflow soldering and resists moisture absorption better than uncoated tantalum chips.