The AL12B28N0*TR from KYOCERA AVX is a RF Inductor with Inductance 0.028 uH, DC Resistance 0.006 Ohms, DC Current 4 A, Self Resonant Frequency 1.8 GHz, Operating Temperature -40 to 125 Degree C. Tags: Air Core Inductor, Wire Wound Inductor. More details for AL12B28N0*TR can be seen below.