What This BNC Plug Does in the RF Path
The 1-1478403-0: The 75 Ohm impedance and 2 GHz frequency ceiling make it a fit for composite video, CCTV, and baseband digital video distribution where 50 Ohm BNCs would introduce a mismatch.
This plug accepts cable groups RG-179B, 187A, and URM111 — the small-diameter 75 Ohm coax types common in video patch panels and broadcast racks. Termination is solder to the centre pin, with the shield clamped by the body.
RF Performance at a Glance
Rated insertion loss is 0.2 dB across the band up to 2 GHz — low enough that a single mated pair won't eat into your link budget noticeably.
No official replacement part number or cross-reference is available from the manufacturer. A 75 Ohm BNC plug with the same cable-group support and silver-plated contacts is the functional equivalent to search for.