What the 470 µF and 35 mOhm ESR mean for your rail
The TPSE477M004R0035 is a 470 µF tantalum capacitor rated at 4 V with a 35 mOhm equivalent series resistance, in the molded TPS series from KYOCERA AVX. The 35 mOhm ESR keeps the ripple voltage low and the ripple current rating high relative to a higher-ESR part. The ±20% tolerance is standard for tantalum electrolytics — the capacitance shift over temperature and DC bias is already accounted for in the datasheet curve, so the tolerance band is the room-temperature, zero-bias spread.
Package fit for 2917 (7343 Metric) footprint
This is a common footprint for high-value tantalum capacitors — the same pad layout serves multiple suppliers, so a second-source swap does not require a board spin. Surface-mount assembly on standard reflow profiles; the molded body handles 260 °C peak reflow per JEDEC. Tape-and-reel packaging feeds directly into pick-and-place lines.
Temperature range and operating environment
Rated for -55 °C to 125 °C operation — this covers industrial, automotive under-hood, and telecom outdoor cabinets where the ambient temperature can hit 105 °C with self-heating from ripple current.
No minimum order quantity beyond the standard reel increment.