This inductor from the SDR1006 series is a drum core, wirewound type and is unshielded. It has an inductance of 3.9 mH and a tolerance of ±10%. The package is nonstandard and the mounting is SMD (SMT). The height - seated (max) is 0.228" (5.80mm) and the temperature range for operating is -40°C to 125°C. The dimensions are 0.386" L x 0.386" W (9.80mm x 9.80mm). The DC resistance (DCR) is 14.8Ohm Max and the current rating (amps) is 110 mA. The Mfr is Bourns Inc.