The 5413558-1: Rated to 2 GHz, it covers composite video, SDI, and legacy CCTV installations. Gold plating on the beryllium copper center contact supports 500 mating cycles, so it holds up in field-service or test-point duty.
The 75 Ohm vs 50 Ohm Question
This is a 75 Ohm connector, not 50 Ohm. Plugging a 75 Ohm BNC into a 50 Ohm system works electrically but causes a mismatch — about 0.18 dB of return loss at low frequencies, worse as frequency climbs. For video (75 Ohm native), it's a direct fit. For 50 Ohm RF paths, a 50 Ohm BNC jack is the correct interface; the 5413558-1 will pass signal but the impedance step will reflect energy.
Sourcing the 5413558-1 Today
Because this part is obsolete, it is not stocked in volume. For a guaranteed production path, the 5413558-2 is the recommended drop-in and avoids last-time-buy risk.