The SD3481 from Fairview Microwave is a DC Block with Frequency 0.1 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-Outer DC Block. More details for SD3481 can be seen below.