The ER17S823JKR from Gowanda Electronics is a RF Inductor with Inductance 820 uH, DC Resistance 13 Ohms, DC Current 80 mA, Self Resonant Frequency 4.2 MHz, Operating Temperature -55 to 105 Degree C. Tags: Ceramic Inductor, Wire Wound Inductor. More details for ER17S823JKR can be seen below.