The ER17S303JR from Gowanda Electronics is a RF Inductor with Inductance 300 uH, DC Resistance 6.4 Ohms, DC Current 110 mA, Self Resonant Frequency 6.5 MHz, Operating Temperature -55 to 105 Degree C. Tags: Ceramic Inductor, Wire Wound Inductor. More details for ER17S303JR can be seen below.