Capacitor type and rail voltage
The EEF-CX0D271XR: A 270 µF polymer capacitor rated 2 V, the Panasonic SP-Cap CX series delivers solid-capacitor ESR performance in a low-profile surface-mount package — the 2917 (7343 metric) case with a 1.90 mm seated height sits flat against the board without the height penalty of taller component families. Polymer chemistry gives this part lower ESR than a comparable tantalum or wet-aluminum part of the same case size, which is what makes it useful as a local decoupling or rail-smoothing element close to a load IC — the 2 V rating suits 1.8 V and lower rail points where headroom above 200 mV is needed.
ESR, ripple current, and switching performance
The 5.6 A ripple current rating at 100 kHz sets the current-handling ceiling for the switched node or output filter position — above this current the capacitor self-heats past the rated temperature band, accelerating the 2000-hour lifetime at 105°C. At 105°C operating ambient the 2000-hour rated lifetime is appropriate for consumer and general-purpose applications; the -55°C lower limit covers cold-start and outdoor-equipment temperature extremes — a MIL or automotive-grade polycap would be specified differently for long-life mission profiles.
Footprint, land pattern, and board integration
The 0.287-inch by 0.169-inch (7.30 mm × 4.30 mm) land pattern matches the industry-standard 2917/7343 metric SMD land — the surface mount land size in the spec matches the component body exactly, so the PCB pad geometry follows the datasheet footprint without additional scaling.
The EEF-CX0D271XR is listed Active by Panasonic Electronic Components; no official successor or cross-reference appears in the manufacturer record — the SP-Cap CX base product number (EEF-CX) is the series anchor if a parametric replacement in the same family is required.