The ER17S121JKR from Gowanda Electronics is a RF Inductor with Inductance 1.2 uH, DC Resistance 0.1 Ohms, DC Current 895 mA, Self Resonant Frequency 130 MHz, Operating Temperature -55 to 105 Degree C. Tags: Ceramic Inductor, Wire Wound Inductor. More details for ER17S121JKR can be seen below.