Why 500 mOhm ESR matters on a 10 µF cap
The TPSC106M025R0500: The 500 mOhm ESR at 10 µF is the spec that decides whether this cap works as a bulk decoupler on a switch-mode rail or as a general-purpose filter. The trade-off is that tantalum caps have lower ripple-current capability than ceramics; if your load draws more than 200 mA RMS, you need to derate or parallel another cap.
That matters when the board lives in an engine bay that sees 105°C on a summer grade, or in a satellite that cold-soaks to -55°C during eclipse. The molded package (size code C, 6.00 mm x 3.20 mm x 2.80 mm) handles the thermal expansion without cracking the dielectric — a failure mode common in larger-case tantalums under temperature cycling.
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