The SESI 15 18K 1SR from Exxelia Technologies is a Space Qualified Inductor with Inductance 18 µH(No Load), Inductance Tolerance ± 20%, DCR 29 mOhms, Saturation Current 3.1 A(Rated), Temperature Operating Range -55 to 125 Degree C. Tags: Surface Mount. More details for SESI 15 18K 1SR can be seen below.