The DB-N1N25A-3G100V/H44-H4 from Rosnol is a DC Block with Frequency DC to 3 GHz, Insertion Loss 0.1 to 0.2 dB, Breakdown Voltage 100 V, VSWR 1.12:1, 1.20:1, Return Loss 20.83 to 24.94 dB. Tags: Connectorized, Inner DC Block. More details for DB-N1N25A-3G100V/H44-H4 can be seen below.