The AIAC-1812-39NJ-T from Abracon LLC is a RF Inductor with Inductance 0.039 µH, DC Resistance 0.0056 Ohms, DC Current 2.8 A, Self Resonant Frequency 2.1 GHz, Operating Temperature -40 to 125 Degree C. Tags: Air Core Inductor. More details for AIAC-1812-39NJ-T can be seen below.