The ER5025S-431J from Gowanda Electronics is a RF Inductor with Inductance 4.3 uH, DC Resistance 0.55 Ohms, DC Current 0.48 A, Self Resonant Frequency 60 MHz, Operating Temperature -55 to 105 Degree C. Tags: Wire Wound Inductor. More details for ER5025S-431J can be seen below.