The ER5025S-434J from Gowanda Electronics is a RF Inductor with Inductance 4300 uH, DC Resistance 81.6 Ohms, DC Current 0.015 to 0.038 A, Self Resonant Frequency 1.7 MHz, Operating Temperature -55 to 105 Degree C. Tags: Wire Wound Inductor. More details for ER5025S-434J can be seen below.