The ER5025S-394 from Gowanda Electronics is a RF Inductor with Inductance 3900 uH, DC Resistance 73.8 Ohms, DC Current 0.017 to 0.04 A, Self Resonant Frequency 1.9 MHz, Operating Temperature -55 to 105 Degree C. Tags: Wire Wound Inductor. More details for ER5025S-394 can be seen below.