The AISC-0603F-3R9K-T from Abracon LLC is a RF Inductor with Inductance 3.9 µH, DC Resistance 1.9 Ohms, DC Current 0.19 A, Self Resonant Frequency 50 MHz, Operating Temperature -40 to 85 Degree C. Tags: Wire Wound Inductor. More details for AISC-0603F-3R9K-T can be seen below.