The DCB3T from Microwave Devices Inc. is a DC Block with Frequency 10 MHz to 18 GHz, Insertion Loss 0.50 dB, Breakdown Voltage 200 V, VSWR 1.35:1, Operating Temperature -65 to 125 Degree C. Tags: Connectorized, Inner-Outer DC Block. More details for DCB3T can be seen below.