PM1812-221J-RC is a surface-mount chip inductor from the PM1812 series designed for use in DC/DC converters, power supplies, and general applications. The device features a ferrite core with copper wire coil and epoxy resin enclosure, delivering 220 µH inductance with ±5% tolerance. It operates across a temperature range of -40°C to +125°C with a maximum temperature rise of 20°C, and exhibits high resistance to heat, humidity, mechanical shock, and pressure. The inductor has a self-resonant frequency (SRF) minimum of 13 MHz, DC resistance (RDC) maximum of 3.2 ohms, and maximum DC current (IDC) of 180 mA, making it suitable for compact power management circuits requiring reliable filtering and energy storage in space-constrained applications.