The 7DCB2N4 from Microwave Devices Inc. is a DC Block with Frequency 10 MHz to 4 GHz, Insertion Loss 0.50 dB, Breakdown Voltage 200 V, VSWR 1.35:1, Operating Temperature -65 to 125 Degree C. Tags: Connectorized, Outer DC Block. More details for 7DCB2N4 can be seen below.