The ECS-MPI4040R1-1R0-R from ECS Inc. International is a RF Inductor with Inductance 1 µH, DC Resistance 28 mOhms, DC Current 3.7 A (RMS), 7.7 A (Saturated), Self Resonant Frequency 20 kHz to 10 MHz, Operating Temperature -55 to 125 Degree C. Tags: Chip Inductor. More details for ECS-MPI4040R1-1R0-R can be seen below.