The ER17S300JR from Gowanda Electronics is a RF Inductor with Inductance 0.3 uH, DC Resistance 0.13 Ohms, DC Current 780 mA, Self Resonant Frequency 250 MHz, Operating Temperature -55 to 105 Degree C. Tags: Ceramic Inductor, Wire Wound Inductor. More details for ER17S300JR can be seen below.