The ER17S123JKR from Gowanda Electronics is a RF Inductor with Inductance 120 uH, DC Resistance 3.6 Ohms, DC Current 150 mA, Self Resonant Frequency 9.7 MHz, Operating Temperature -55 to 105 Degree C. Tags: Ceramic Inductor, Wire Wound Inductor. More details for ER17S123JKR can be seen below.