The 0603AF-50NXJR_ from Coilcraft is a RF Inductor with Inductance 0.05 µH, DC Resistance 0.052 Ohms, DC Current 1.7 A(Irms), Self Resonant Frequency 1800 MHz, Operating Temperature -40 to 85 Degree C. Tags: Chip Inductor, Wire Wound Inductor. More details for 0603AF-50NXJR_ can be seen below.