HF50CXIL6M HF75CXIL6M Underwater Connector Coax series In-Line Connector Male

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HF50CXIL6M / HF75CXIL6M In-Line Coax Connector — Overview

The HF50CXIL6M / HF75CXIL6M is a SubConn Compatible in-line (cable-to-cable / cable-to-equipment) subsea coaxial connector, male (pins) face, combining one gold-plated coax contact with six electric power/signal contacts in a single concentric wet-mateable interface. Supplied in 50 Ω and 75 Ω impedance versions, it carries high-definition (HD) video from cameras and telemetry systems together with power and control signals through one penetration, rated to 600 bar (approx. 6,000 m) when mated.

Coax + 6 Electric Contacts 50 / 75 Ω 3.0 GHz HD Video 600 bar Mated / 6,000 m 300 V / 5 A Dry Mate SubConn Compatible

Key Design Features

HD video + power in one connector: a specialized concentric design maintains constant characteristic impedance while six electric contacts handle power and signal on the same interface.
50 Ω and 75 Ω versions: matched to standard video and RF equipment; recommended bandwidth up to 3.0 GHz with low, published attenuation.
SubConn Compatible: standard A-size footprint with the characteristic locking sleeves, so it retrofits existing SubConn Coax panels and handlers without re-machining.
Depth qualified: pressure tested to 600 bar / 8,700 psi mated — hydrostatic conditions at approx. 6,000 m.
Gold-plated contacts: coax contacts gold-plated; power contacts in gold-plated brass UNS-C36000 (sockets) and gold-plated beryllium copper (pins) for stable low-resistance paths.
Rugged marine build: chloroprene rubber body, nitrile O-rings and stainless steel snap rings for offshore, defence and oceanographic service.

Technical Specifications

Parameter	Specification
Electric contacts	1 coax contact + 6 electric power/signal contacts (7-contact concentric face)
Voltage rating (electric contacts)	300 V DC/AC rms
Current rating (electric contacts)	5 A per contact (max 20 A per connector)

Parameter	50 Ω version	75 Ω version
Coax impedance	50 Ω	75 Ω
Voltage rating (coax insert only)	800 V, max nominal voltage acc. to MIL	930 V, max nominal voltage acc. to MIL
Frequency range (tested)	0.3 – 3.0 GHz (recommended max 3.0 GHz)	0.9 – 3.0 GHz (recommended max 3.0 GHz)
Attenuation (10 m assembly, 2 bulkheads)	0.3 GHz: 5.0 dB • 0.6 GHz: 7.7 dB • 0.9 GHz: 9.9 dB • 1.2 GHz: 11.6 dB • 1.5 GHz: 13.4 dB • 1.8 GHz: 15.3 dB • 2.1 GHz: 17.3 dB • 2.4 GHz: 19.3 dB • 2.7 GHz: 21 dB • 3.0 GHz: 22.5 dB	0.9 GHz: 6.3 dB • 1.2 GHz: 7.4 dB • 1.5 GHz: 8.6 dB • 1.8 GHz: 9.9 dB • 2.1 GHz: 11.3 dB • 2.4 GHz: 12.8 dB • 2.7 GHz: 14.5 dB • 3.0 GHz: 15.7 dB

Parameter	Specification
Temperature rating (water)	-4 °C to +60 °C (+25 to +140 °F)
Temperature rating (air)	-40 °C to +60 °C (-40 to +140 °F)
Storage temperature	-40 °C to +60 °C (-40 to +140 °F)
Qualified pressure (mated)	600 bar / 8,700 psi — approx. 6,000 m water depth

Mechanical

Parameter	Specification
Minimum bending radius (inline cable)	100 mm
Footprint	Standard A-size, same outline as SubConn Compatible A-size circular series

Materials

Parameter	Specification
Connector body	Chloroprene rubber
Bulkhead body	Brass / stainless steel / titanium / anodised aluminium (options)
Power contacts	Female sockets: gold-plated brass UNS-C36000; male pins: gold-plated beryllium copper
Coax contacts	Gold-plated
O-rings	Nitrile
Locking sleeves	POM or stainless steel (required — DLSA type)
Snap rings	Stainless steel AISI 302

Inline Cable & Termination

Parameter	50 Ω (RG58 / RG316)	75 Ω (Mini-RG59 / RG179)
Inline cable (2 ft / 60 cm)	PUR jacket cable with RG58 coax + 6 x 20 AWG (0.52 mm²) conductors	PUR jacket cable with Mini-RG59 coax + 6 x 20 AWG (0.52 mm²) conductors
Nominal cable OD	RG58 PUR cable 5.59 mm; RG58 + 6-conductor PUR cable 9.70 mm	Mini-RG59 PUR cable 5.59 mm; Mini-RG59 + 6-conductor PUR cable 9.70 mm
BNC connector for RG58 cable	Amphenol 112116 or equivalent	Belden 1855ABHD3 or equivalent

Parameter	Specification
Electric lead colour code (inline)	1 Black • 2 White • 3 Red • 4 Green • 5 Orange • 6 Blue

Mating & Compatibility

Parameter	Specification
Mates with	50CXBH6F / 75CXBH6F bulkhead connectors (female)
Dummy connector	CXDC6F dummy connector (male side); CXDC6M for the mated pair
Interchangeability	SubConn Compatible — SubConn Coax series (50/75 ohm, coax-only CXBH/CXIL and coax+electric CXBH6/CXIL6)

Typical Applications

HD underwater camera and video systems, ROV and ROTV telemetry, sonar and antenna feeds, offshore oil and gas and renewable energy systems, defence equipment, oceanographic instrumentation and diving systems.

Notes for Selection

Dry mating only. Coax series connectors are designed for dry mating and are not suitable for open-face pressure or waterblock applications, and they are not rated for wet mating cycles. Locking sleeves are required. Do not grease the actual coax part. All frequency and attenuation values are based on a 10 m cable assembly test including two bulkhead connectors.

Custom configurations available Bulkhead body material (brass / stainless steel / titanium / anodised aluminium), thread and lead lengths, customised harness cables and direct moulding to selected PUR cables can be specified to order. Certified pressure test reports available on request. Send us your drawing or mating requirement for a quotation.

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Coax_series_www_uwconn_com.pdf

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