...

Product Series

(100% SubConn、Seacon and Burton Compatible)

High-Frequency Coaxial Watertight Connector

Request a quote for: High-Frequency Coaxial Watertight Connector

Get your non-binding quote today and see how we can help.

(Click on the image to enlarge)

1. Drawing information

Dimensions in mm (1 mm = 0.03937 inch)
Threads in inches (1 inch = 25.4 mm)

2. Male View

3. Main parameters

Main ParametersNotes
Number of PinsRated CurrentCable Wiring SequenceWorking PressureCoaxial CableSignal Transmission FrequencyVoltage Standing Wave RatioReturn Loss
6 Power
+
1 Coaxial
5A1:Red
2:Black
3:Yellow
4:Blue
5:Orange
6:Brown
50MPa75-31.6GHZ1.3-0.75DBInstallation Requirements:
Drawing dimension unit: mm, base mounting radius: 18.5mm, surface finish: Ra1.6, mounting thread: 1/2-20UNF-2A, thread length: 19 mm.

4. Product Description

High-Frequency Coaxial Watertight Connectors

Product Overview & Series Introduction

The High-Frequency Coaxial Watertight Connectors series by HYSF Subsea (Xiamen Chuida Technology Co., Ltd.) is a highly specialized interconnect line engineered specifically for underwater Radio Frequency (RF) and high-bandwidth signal transmission. Purpose-built to maintain absolute signal integrity while operating under severe hydrostatic pressures, this high-performance series ensures exceptionally low insertion loss and high return loss across marine communication networks. Developed through our dedicated independent technical innovation system, this product line serves as an elite domestic substitution for core imported subsea parts, successfully breaking long-standing international brand monopolies.

Every connector configuration in the high-frequency coaxial series is manufactured using an advanced unibody High-Temperature Vulcanization (HTV) process, integrally molding premium gold-plated copper contacts within heavy-duty neoprene rubber bodies. This advanced construction guarantees uncompromised environmental sealing, robust physical insulation, and enduring resistance to harsh marine conditions. To satisfy complex RF distribution requirements across specialized high-frequency enclosures, radar panels, and subsea vehicle frames, the series offers complete interconnected sets, including:

  • RF Cable Assemblies: Low-attenuation Coaxial Male and Female inline cable assemblies (SFMCTZILM and SFMCTZILF) optimized to eliminate signal reflection and cross-talk[cite: 1].
  • Precision Bulkhead Receptacles: Rugged threaded bulkhead receptacles (such as SFMCTZBHM and SFHFTZBHM) precision-machined from top-tier marine metals—including 316L Stainless Steel, Titanium Alloy, or Naval Brass[cite: 1]. These chassis penetrators are paired with specialized high-elastic fluororubber O-rings to maintain absolute pressure hull isolation[cite: 1].
  • Fitted Protection Fittings: Heavy-duty matching protective blanking dummy plugs (SFMCTZDCM and SFMCTZDCF) paired with precision structural locking nuts (manufactured from standard POM or optional 316L stainless steel) to completely shield uncoupled channels from salt spray, seawater ingress, and biological fouling[cite: 1].

Key Technical Specifications & Core Features

  • Precision Impedance Matching: Features a dedicated 50Ω or 75Ω impedance matching architecture (supporting subsea coaxial cable profiles like 50-3, 50-5, and 75-3) to ensure seamless electrical performance and prevent signal degradation[cite: 1].
  • High-Frequency Transmission Bandwidth: Certified to comfortably handle high-frequency RF transmissions up to 1.6 GHz while maintaining an optimal Voltage Standing Wave Ratio (VSWR) of 1.3 and a minimized insertion loss profile of just -0.75dB[cite: 1].
  • Deep-Sea Hydrostatic Sealing: Fully verified under a maximum continuous working pressure of 50MPa, guaranteeing an absolute zero-leakage security threshold at simulated operational diving depths down to 5,000 meters[cite: 1].
  • Hybrid Configuration Capabilities: Supports specialized custom configurations combining coaxial paths with low-voltage power lines (such as our 6 Power + 1 Coaxial layout) rated at 5A per power pin under a steady working operational voltage of 550V AC/DC[cite: 1].
  • Excellent Electrical Insulation: Backed by a low contact resistance profile of less than 0.01Ω and a superior insulation resistance threshold of ≥200MΩ @ 1000V DC[cite: 1].
  • Broad Operating Thermal Range: Certified to preserve material flexibility and mechanical locking compliance across an extreme operating temperature envelope stretching from -60°C up to +80°C with a mechanical life exceeding 500 mating cycles[cite: 1].

Industrial Applications & Working Conditions

The High-Frequency Coaxial Subsea Series is explicitly tailored to handle continuous multi-channel RF data looping under intense industrial vibrations, deep-water hydrostatic loads, high-salinity corrosive salt sprays, and harsh ultraviolet aging conditions[cite: 1]. Critical deployment sectors include:

1. Acoustic Detection Equipment & Sonar Platforms

Acts as the primary connection interface for side-scan sonar arrays, hydrophones, marine acoustic positioning transducers, and subsea seismic monitoring devices[cite: 1]. The precise impedance matching layout ensures raw acoustic telemetry streams return to central processing hulls with zero wave distortion or frequency attenuation[cite: 1].

2. Marine Radar & High-Frequency Communication Grids

Serves as the critical RF connectivity backbone for subsea communication nodes, autonomous vehicle sensor arrays, and surface-splash naval radar hubs[cite: 1]. It allows high-frequency microwave and wave signals to route continuously through bulkheads with premium shielding performance[cite: 1].

3. Real-Time High-Definition Underwater Video Monitoring

Extensively deployed across deep-sea analog and high-frequency digital visual systems, diving monitoring boxes, and high-resolution camera setups[cite: 1]. By supporting high-bandwidth signal transmission paths, it guarantees a real-time, flicker-free transmission of critical visual data[cite: 1].

4. Advanced Marine Robotic Systems (ROVs & AUVs)

Deploys seamlessly as a small-footprint high-speed signal transmission path on Remotely Operated Vehicles (ROVs) and Autonomous Underwater Vehicles (AUVs)[cite: 1]. The unibody vulcanized neoprene joints efficiently handle mechanical pulling strains and severe mechanical jolts while keeping high-speed computing data loops dry under high pressure loads[cite: 1].

Frequently Asked Questions (FAQ)

Q1: Why should a dedicated High-Frequency Coaxial connector be specified over a standard multi-pin connector for RF signals?

A: Standard multi-pin connectors are highly prone to severe high-frequency signal distortion, impedance mismatching, and cross-talk when transmitting RF signals over subsea lines[cite: 1]. The HYSF Coaxial series provides a dedicated 50Ω or 75Ω continuous shielding profile that successfully restricts insertion loss to -0.75dB and fixes the Voltage Standing Wave Ratio (VSWR) at 1.3, guaranteeing stable high-frequency data streaming up to 1.6 GHz[cite: 1].

Q2: Can these high-frequency coaxial connectors be mated while fully submerged underwater?

A: Yes, absolutely[cite: 1]. This high-frequency series features dependable wet-mateable technology[cite: 1]. The high-temperature vulcanized neoprene rubber bodies are designed with tight-tolerance wiping lips that physically displace moisture away from the contact interfaces during coupling, ensuring the connection preserves a superior insulation threshold comfortably exceeding 200MΩ even when mated in high-salinity seawater[cite: 1].

Q3: What strict factory quality testing protocols do these high-frequency coaxial connectors undergo?

A: Product reliability in extreme data environments is our core foundation, ensuring a proven 99.98% field reliability rate[cite: 1]. Every single production batch undergoes severe pre-shipment testing inside our standardized inspection architecture before factory delivery[cite: 1]:

  • Hydrostatic Pressure Testing: Tested inside our specialized 100MPa high-pressure pump system, holding full target pressure for 60 minutes to verify zero structure leakage and zero material deformation at simulated diving depths up to 5,000 meters[cite: 1].
  • Insulation Resistance (IR) Test: Verified with a 15kV insulation tester across all contacts and nodes to guarantee that insulation properties exceed ≥200MΩ @ 1000V DC[cite: 1].
  • Dielectric Withstand Test (Hipot): Evaluated at 2000V DC for 1 minute between the internal core conductor and the outer metal shielding to confirm that leakage current remains safely below 10mA[cite: 1].
  • High-Frequency Performance Testing: Checked via calibrated vector network analyzers to verify a steady signal transmission frequency up to 1.6 GHz, a Voltage Standing Wave Ratio below 1.3, and insertion loss limits within the standard -0.75dB requirement[cite: 1].
  • Dynamic Continuity Test: Monitored under real-time resistance meters while undergoing a vigorous manual “shake test” on the cable and joint to ensure uninterrupted signal stability under severe marine vibrations[cite: 1].

Q4: What base metal options can be specified for the bulkhead receptacle housing shells?

A: Our standard stock configurations feature premium high-temperature vulcanized neoprene rubber molded over 316L Stainless Steel, which provides excellent overall mechanical strength and standard rust resistance[cite: 1]. For specialized engineering projects, we provide high-precision custom machining upgrades in Titanium Alloy (ideal for strict weight-saving limitations and ultra-deep submersibles) and Naval Brass / Marine Bronze (highly recommended for shallow-water aquaculture due to natural anti-biofouling properties), as well as hard-anodized aircraft aluminum[cite: 1].

Q5: What corporate quality management systems and standards govern HYSF subsea manufacturing?

A: HYSF operates under a strictly standardized quality architecture as a certified Technology Enterprise holding over ten core patents[cite: 1]. Our facilities are fully audited and certified under the ISO 9001 Quality Management System[cite: 1]. Furthermore, our manufacturing workflows, precision production, and raw material tracking records comply directly with the strict GJB 9001C-2017 National Quality Standard, delivering mission-critical durability across national marine defense contractors, top shipyards, and major research bodies like the Chinese Academy of Sciences (CAS)[cite: 1].

Contact

Jason Liu

Chief Technical Officer

HYSF Subsea

Proven Solutions in the Field

A showcase of our successful collaborations with global marine robotics, energy, and research partners. Every project reflects our commitment to zero-leak integrity and operational reliability.

Start Your Subsea Project with HYSF

Whether you need a quick quote for standard connectors or a complex custom cable assembly, our engineering team is ready to assist. Expect a technical response within 12 hours.

John Zhang

CEO

Jason Liu
Kevin Wang
Cindy Chen
Lily Li
Contact Form Demo
页眉表单