The ER10M300JR from Gowanda Electronics is a RF Inductor with Inductance 0.3 uH, DC Resistance 0.22 Ohms, DC Current 815 mA, Self Resonant Frequency 410 MHz, Operating Temperature -55 to 125 Degree C. Tags: Ceramic Inductor, Wire Wound Inductor. More details for ER10M300JR can be seen below.