The 1212VS-42NME_ from Coilcraft is a RF Inductor with Inductance 0.042 uH, DC Resistance 0.7 to 0.77 Ohms, DC Current 38 to 52 A, Self Resonant Frequency 557 MHz, Operating Temperature -40 to 125 Degree C. Tags: Air Core Inductor. More details for 1212VS-42NME_ can be seen below.