The ER15M300JR from Gowanda Electronics is a RF Inductor with Inductance 0.3 uH, DC Resistance 0.09 Ohms, DC Current 1400 mA, Self Resonant Frequency 360 MHz, Operating Temperature -55 to 125 Degree C. Tags: Ceramic Inductor, Wire Wound Inductor. More details for ER15M300JR can be seen below.