The ER17S221JKR from Gowanda Electronics is a RF Inductor with Inductance 2.2 uH, DC Resistance 0.19 Ohms, DC Current 650 mA, Self Resonant Frequency 100 MHz, Operating Temperature -55 to 105 Degree C. Tags: Ceramic Inductor, Wire Wound Inductor. More details for ER17S221JKR can be seen below.