10 µF, 50 V, 300 mOhm ESR — the TPS series workhorse
The TPSE106M050R0300: The 300 mOhm ESR is the key number for the BOM — it sets the ripple current capability and the self-heating under AC load. In a 50 V rail, this part handles the bulk decoupling for a downstream regulator or a moderate-power DC-DC converter where the ripple stays within the capacitor's dissipation limit.
E case, 2917 footprint — board-fit check
The manufacturer size code is E. This is the standard footprint for a 50 V tantalum in this capacitance range — the pad layout on the PCB is well established and the part sits flat for reflow soldering. The surface-mount package is tape-and-reel ready for pick-and-place.
The molded construction and the TPS series' general-purpose rating mean this cap is suited for bulk storage and decoupling in power supplies, motor drives, and control modules that see the full temperature swing. No derating is required at the upper end for voltage — the 50 V rating is the nominal working voltage across the range.