The JC05003000P57C50 from RFTR Electronics is a Directional Coupler with Frequency 500 MHz to 3 GHz, Coupling 50 dB, Coupling Variation ±0.5 dB, Directivity 20 dB, Average Power 500 W. Tags: Module with Connectors. More details for JC05003000P57C50 can be seen below.