The ER5025S-512J from Gowanda Electronics is a RF Inductor with Inductance 51 uH, DC Resistance 2.23 Ohms, DC Current 0.124 to 0.235 A, Self Resonant Frequency 21 MHz, Operating Temperature -55 to 105 Degree C. Tags: Wire Wound Inductor. More details for ER5025S-512J can be seen below.