Why this capacitor's ESR matters for your rail
Its 1.8 Ohm ESR is the spec that drives the ripple voltage and self-heating in a DC-DC output filter — a higher ESR means more I²R loss and a larger ripple voltage for a given ripple current. For a 100 mA ripple current, expect about 180 mV of ripple across the capacitor alone.
The molded case provides mechanical stability across that range without the risk of conformal-coat cracking that open-frame parts sometimes show.
