The DB-A1A25A-3G16V/H33-H3 from Rosnol is a DC Block with Frequency DC to 3 GHz, Insertion Loss 0.4 dB, Breakdown Voltage 16 V, VSWR 1.20:1, Return Loss 20.83 dB. Tags: Connectorized, Inner DC Block. More details for DB-A1A25A-3G16V/H33-H3 can be seen below.