The JC00010030P57C40 from RFTR Electronics is a Directional Coupler with Frequency 1.5 to 30 MHz, Coupling 40 dB, Coupling Variation ±1 dB, Directivity 20 dB, Average Power 500 W. Tags: Module with Connectors. More details for JC00010030P57C40 can be seen below.