The SD3479 from Fairview Microwave is a DC Block with Frequency 0.01 to 50 GHz, Insertion Loss 1.5 dB, Breakdown Voltage 75 Volts, VSWR 1.75:1, Operating Temperature 5 to 75 Degree C. Tags: Connectorized, Inner DC Block. More details for SD3479 can be seen below.