The 0603AF-121XJR_ from Coilcraft is a RF Inductor with Inductance 0.12 µH, DC Resistance 0.095 Ohms, DC Current 1.4 A(Irms), Self Resonant Frequency 1200 MHz, Operating Temperature -40 to 85 Degree C. Tags: Chip Inductor, Wire Wound Inductor. More details for 0603AF-121XJR_ can be seen below.