Capacitance, voltage, and ESR – the three numbers that decide fit
The TPSB475K025R1500 is a 4.7 µF molded tantalum capacitor rated at 25 V with a 1.5 Ω ESR. That ESR number is the one that matters most in a power rail decoupling job — a 1.5 Ω ceiling means the ripple current rating is around 0.4 A at 85°C, so if your output stage pulls more than that, the cap will run hot and the failure mode is a short, not a graceful open. The ±10% tolerance on the 4.7 µF value is tight enough for most bulk decoupling and timing circuits; a ±20% part would leave less margin for the voltage coefficient drop at the rated 25 V.
Temperature range and environment – where this cap survives
That means it holds up in avionics, downhole tools, satellite power buses, and engine-bay electronics — the scorch mark on a failed board is rarely the tantalum if it's this grade. The molded case (Type: Molded) gives better mechanical protection than a conformal-coated chip, and the 1411 (3528 Metric) / 1210 footprint is a standard size — no special pad geometry needed beyond the usual derating for tantalum (typically 50% voltage derating for best reliability).
Lifecycle and sourcing – still in production, no LTB pressure
RoHS compliance is standard for the TPS series; no special exemption paperwork needed for EU or California markets.
Package and mounting – surface-mount checklist
The 0.138" × 0.110" (3.50 mm × 2.80 mm) footprint with a seated height of 0.083" (2.10 mm) fits under low-profile heatsinks or in tight mezzanine stacks. General-purpose feature set — no low-ESR or high-reliability screening, so if your application calls for surge-current testing (MIL-PRF-55365), you need the TPS series with the /R suffix or a different part. This one is for standard decoupling and filtering.