The ER15M391JKR from Gowanda Electronics is a RF Inductor with Inductance 3.9 uH, DC Resistance 2.3 Ohms, DC Current 280 mA, Self Resonant Frequency 100 MHz, Operating Temperature -55 to 125 Degree C. Tags: Ceramic Inductor, Wire Wound Inductor. More details for ER15M391JKR can be seen below.