8.2 mH shielded drum core — saturation current is the binding constraint
The Coilcraft LPS6235-825MRC is a shielded drum core inductor in the LPS6235 series, delivering 8.2 mH ±20% inductance in a 2424 (6060 metric) surface-mount package. The 85 mA rated current is the thermal limit at 25°C ambient, but the 52 mA saturation current (Isat) is the real ceiling for DC bias applications — once the core saturates, inductance drops off sharply and the ripple current spikes. For any rail carrying more than 52 mA DC, this part derates below its nominal inductance.
24 Ohm DCR and 700 kHz SRF — the loss and bandwidth trade-off
DC resistance is 24 Ohm max, which at 85 mA produces 173 mW of copper loss (I²R). That heat stays inside the shielded ferrite core, so the part relies on the PCB copper pad for thermal dissipation — the 6.20 mm × 6.20 mm footprint gives a modest thermal path. The self-resonant frequency is 700 kHz; above that the inductor behaves capacitively. For switching converters, keep the switching frequency well below 700 kHz to stay in the inductive region.
The shielded construction reduces radiated EMI, which helps pass CISPR 25 conducted emissions in automotive modules.