The HJF-A-500 SQ from Crane Aerospace & Electronics is a 180 Degree Hybrid Coupler with Frequency 5 to 1000 MHz, Average Power 1 W, Coupling 3 dB, Amplitude Balance 0.2 to 0.4 dB, Phase Balance ±2 to ±4 Degrees. Tags: Flatpack. More details for HJF-A-500 SQ can be seen below.