The ECS-MPI4040R4-3R3-R from ECS Inc. International is a RF Inductor with Inductance 3.3 µH, DC Resistance 52 mOhms, DC Current 3.3 A (RMS), 4.5 A (Saturated), Self Resonant Frequency 20 kHz to 10 MHz, Operating Temperature -55 to 125 Degree C. Tags: Chip Inductor. More details for ECS-MPI4040R4-3R3-R can be seen below.