The ER1641-121 from API Delevan is a Space Qualified Inductor with Inductance 0.12 µH, Inductance Tolerance ±5 to 10%, DCR 0.034 Ohms, Saturation Current 1530 mA, SRF 250 MHz. Tags: Solder Mount, Leaded. More details for ER1641-121 can be seen below.