MCOM4M 4-Pin Male Micro Circular Overmould Wet-Mate Underwater Connector

Product Overview

The HYSF SUBSEA MCOM4M 4-Pin Male Micro Circular Overmould Connector is a compact underwater electrical connector designed for demanding subsea applications.Featuring four male electrical contacts, the MCOM4M provides a reliable electrical interface for ROV systems, AUV platforms, underwater cameras, subsea sensors, sonar equipment, and marine instrumentation.Unlike conventional inline cable connectors, the MCOM4M features a factory overmoulded construction. Its chloroprene rubber connector body is moulded directly onto the cable jacket, creating an integrated cable-to-connector assembly.This construction eliminates the need for field cable termination at the connector entry and provides enhanced mechanical strain relief and environmental sealing.The MCOM4M belongs to the Micro Circular wet-mate connector family and is designed for underwater connection and disconnection with its compatible female mating connector.The reference configuration features gold-plated beryllium copper male contacts, a chloroprene rubber overmould body, and nitrile sealing components.With four electrical contacts, a 300 V reference voltage rating, and a 10 A per-contact reference current rating, the MCOM4M is suitable for compact subsea power and signal connections.HYSF SUBSEA can evaluate customized cable lengths, cable constructions, connector materials, and electrical configurations according to OEM project requirements.

Key Features and Benefits

1. Four-Pin Micro Circular Configuration

The MCOM4M features four independent male electrical contacts within a compact Micro Circular connector interface.This configuration allows multiple electrical circuits to be integrated into a small underwater connection.Typical applications include:

• Sensor power supply
• Control signal transmission
• Underwater instrumentation
• Camera power connections
• Auxiliary equipment
• Subsea monitoring systems

2. Factory Overmoulded Cable Construction

The MCOM4M features a chloroprene rubber body moulded directly onto the cable jacket.Unlike conventional cable-mounted connectors requiring separate cable termination, the overmould construction creates an integrated cable-to-connector assembly.Key benefits include:

• Permanent cable-to-connector integration
• Improved cable entry sealing
• Enhanced mechanical strain relief
• Reduced risk of cable pull-out
• No field termination at the connector entry
• Suitable for permanent subsea cable assemblies

This construction is particularly useful for equipment requiring reliable cable connections in demanding underwater environments.

3. Male Electrical Contact Configuration

The MCOM4M features four male electrical contacts.The reference design uses gold-plated beryllium copper contacts, providing good electrical conductivity and mechanical contact properties.Gold plating helps maintain stable electrical contact performance and corrosion resistance in marine environments.The connector is designed to mate with the compatible MCOM4F female connector.

4. Wet-Mate Underwater Connection

The MCOM4M belongs to the Micro Circular wet-mate connector family.Its compatible mating interface allows connection and disconnection underwater, reducing the need to recover complete subsea equipment assemblies for maintenance.Typical applications include:

• ROV equipment replacement
• Underwater sensor servicing
• Subsea camera connections
• AUV payload connections
• Marine monitoring equipment
• Underwater instrument maintenance

The correct mating procedure and locking arrangement must be followed during deployment.

5. 300 V Electrical Rating

The published reference specification identifies a 300 V DC/AC RMS voltage rating.This makes the MCOM4M suitable for appropriately designed subsea power and signal circuits.The actual operating voltage should be verified against the cable insulation, contact arrangement, and complete system electrical requirements.

6. 10 A Current Rating Per Contact

The reference specification identifies a current rating of 10 A per contact.The connector also has a specified maximum total current of 20 A.This makes it suitable for compact underwater equipment requiring multiple power and signal circuits.Actual current capacity depends on simultaneous loading, conductor size, ambient temperature, and thermal testing.

7. High-Pressure Subsea Capability

The published reference product specification identifies:

• Mated pressure: 1,400 bar / 20,300 psi
• Open-face pressure: 800 bar / 11,600 psi

These are reference product ratings and must be verified against the final HYSF configuration and hydrostatic test documentation.The actual pressure capability depends on the complete connector assembly, including the cable overmould, mating interface, sealing components, and installation conditions.

8. Gold-Plated Electrical Contacts

The male contacts use gold-plated beryllium copper in the reference configuration.This contact construction provides:

• Good electrical conductivity
• Mechanical strength
• Stable contact performance
• Corrosion resistance
• Reliable electrical mating

The contact resistance reference is below 10 mΩ per contact.

9. Chloroprene Rubber Overmould Body

The connector body is constructed from chloroprene rubber.The overmould is directly bonded or moulded around the cable entry, providing mechanical protection and supporting the environmental sealing arrangement.Benefits include:

• Flexible rubber construction
• Integrated cable entry protection
• Mechanical strain relief
• Resistance to marine exposure
• Suitability for subsea applications

10. More Than 500 Wet-Mating Cycles

The published reference specification identifies more than 500 wet-mating cycles.This makes the connector suitable for applications requiring repeated underwater connection and disconnection.Actual service life depends on mating procedures, environmental conditions, connector maintenance, and the condition of the mating surfaces.

11. Compact Micro Circular Design

The Micro Circular configuration provides four electrical contacts in a compact connector footprint.This is particularly useful for space-constrained equipment, including:

• Micro-ROV systems
• Compact AUV platforms
• Miniature underwater cameras
• Small sensor housings
• Subsea monitoring modules
• Portable oceanographic instruments

12. Secure Locking Arrangement

The reference configuration supports ABS or stainless steel locking sleeve options.The locking arrangement helps maintain a secure connection during underwater operation.The correct locking sleeve should be selected according to the final connector configuration.

13. Custom Cable Assembly Options

The MCOM4M can be supplied as a factory-terminated underwater cable assembly.Potential customization requirements include:

• Cable length
• Cable outer diameter
• Conductor cross-section
• Cable jacket material
• Cable shielding
• Electrical pin assignment
• Connector overmould dimensions
• Locking sleeve material
• Electrical testing
• Hydrostatic pressure testing

Customized assemblies can be evaluated according to OEM project specifications.

MCOM4M Technical Specifications

Parameter	Reference Specification
Brand	HYSF SUBSEA
Model	MCOM4M
Product Series	Micro Circular
Product Type	Overmould Cable Connector
Connector Gender	Male
Number of Contacts	4
Mating Type	Wet-Mate
Rated Voltage	300 V DC/AC RMS
Rated Current	10 A per Contact
Maximum Connector Current	20 A
Insulation Resistance	>200 MΩ
Contact Resistance	<10 mΩ
Mated Pressure Reference	1,400 bar
Open-Face Pressure Reference	800 bar
Wet Mating Cycles	>500
Water Temperature	−4°C to +60°C
Air Temperature	−40°C to +60°C
Overmould Material	Chloroprene Rubber
Male Contact Material	Gold-Plated Beryllium Copper
Sealing	Nitrile O-Ring
Locking Sleeve	ABS / Stainless Steel
Cable Termination	Factory Overmoulded
Compatible Mating Connector	MCOM4F
Cable Length	Customized

Engineering Note: These specifications are based on published MCOM4M reference product information. The 1,400 bar and 800 bar ratings, electrical performance, and mating-cycle life must be verified against the actual HYSF product design and qualification reports before being advertised as guaranteed ratings.

MCOM4M vs. MCIL4M – What Is the Difference?

Both connectors belong to the Micro Circular series, but they have different cable termination structures.

Parameter	MCOM4M	MCIL4M
Product Type	Overmould Connector	Inline Connector
Contacts	4 Male	4 Male
Connection Method	Factory Overmoulded	Cable Termination
Cable Entry	Integrated Overmould	Separate Cable Entry
Strain Relief	Integrated Overmould	Depends on Assembly
Field Termination	Not Required at Connector Entry	Assembly Required
Maintenance	Permanent Cable Assembly	More Flexible Assembly
Typical Application	Permanent Cable Harness	Serviceable Cable Assembly

The MCOM4M is recommended when permanent cable integration and enhanced cable entry protection are priorities.The MCIL4M is more suitable when cable termination flexibility and serviceability are required.

Compatible Connectors and Accessories

MCOM4F – 4-Pin Female Overmould Connector

The MCOM4F is the corresponding female overmould connector in the Micro Circular series.It features four female electrical contacts and is designed to mate with the compatible MCOM4M male connector.

MCBH4F – Female Bulkhead Connector

The MCBH4F is a female panel-mounted connector suitable for fixed installation on compatible subsea equipment housings.It can be used with the corresponding male Micro Circular connector when the mechanical interface is confirmed.

MCIL4F – Female Inline Connector

The MCIL4F is a female inline cable connector designed for cable-to-cable connections.It can be considered for compatible Micro Circular cable assemblies.

MCDC4M / MCDC4F – Protective Dummy Connectors

Compatible protective dummy connectors can be specified to protect exposed mating interfaces when operational connectors are disconnected.The correct dummy configuration should be confirmed according to the connector gender and mechanical interface.

Typical Applications of MCOM4M

1. ROV Systems

The MCOM4M is suitable for compact ROV electrical cable assemblies requiring reliable power and signal connections.

2. AUV Platforms

Autonomous underwater vehicles can use the overmoulded connector for permanent cable connections between internal modules and external equipment.

3. Underwater Camera Systems

The connector can be used in subsea camera cable assemblies for power and control connections.

4. Subsea Sensor Systems

Suitable for underwater pressure, temperature, conductivity, and other sensor installations.

5. Acoustic Equipment

The MCOM4M can be considered for compatible hydrophone and underwater acoustic equipment.

6. Marine Robotics

Compact marine robotic platforms can benefit from the small connector footprint and integrated cable strain relief.

7. Oceanographic Instruments

The connector can be integrated into underwater measurement equipment and marine research instruments.

8. Subsea Monitoring Systems

Suitable for permanent cable connections in underwater monitoring and observation equipment.

9. Underwater Vehicle Payloads

The compact four-contact configuration supports electrical connections for compatible AUV and ROV payload modules.

10. Offshore Equipment

The connector can be evaluated for compatible offshore monitoring and subsea instrumentation systems.

Installation and Maintenance Guidelines

Step 1: Inspect the Connector

Inspect the overmould body, cable entry, contact face, and locking sleeve for visible damage.

Step 2: Inspect the Male Contacts

Check all four male contacts for corrosion, deformation, or contamination.

Step 3: Inspect the Overmould

Check the rubber body and cable entry for cuts, cracks, separation, or mechanical damage.

Step 4: Clean the Mating Interface

Follow the approved wet-mate cleaning procedure and remove any debris from the connector interface.

Step 5: Align the Connector Halves

Align the mechanical keying features of the male and female connectors before mating.

Step 6: Complete the Wet-Mate Connection

Follow the approved mating procedure and ensure that the connector is fully engaged.

Step 7: Secure the Locking Sleeve

Install and engage the specified locking sleeve to prevent accidental separation.

Step 8: Perform Electrical Testing

Verify electrical continuity, contact resistance, and insulation resistance according to the applicable testing requirements.

Step 9: Complete Pressure Qualification

Test the complete connector and cable assembly against the required hydrostatic pressure.

Step 10: Post-Deployment Maintenance

After recovery, rinse the connector with fresh water according to the approved maintenance procedure. Inspect the overmould and contact surfaces before storage.Important: Always follow the approved wet-mate procedure. Avoid excessive cable pulling, bending, or twisting near the overmoulded cable entry.

Quality Control and Testing

Depending on the approved HYSF configuration and project requirements, quality-control procedures may include:

• Visual inspection
• Dimensional inspection
• Overmould appearance inspection
• Cable entry strain relief inspection
• Contact position verification
• Electrical continuity testing
• Contact resistance testing
• Insulation resistance testing
• Mating compatibility testing
• Cable pull testing
• Hydrostatic pressure testing
• Electrical performance verification after pressure testing

Electrical and hydrostatic test reports can be provided according to agreed project requirements.

Frequently Asked Questions

Q1: What is the MCOM4M connector?

The MCOM4M is a four-contact male Micro Circular underwater overmould connector designed for permanent cable assemblies.

Q2: What does MCOM mean?

MCOM refers to Micro Circular Overmould, identifying the overmoulded cable connector configuration.

Q3: Is the MCOM4M male or female?

The MCOM4M has four male electrical contacts.

Q4: Is the MCOM4M wet-mate or dry-mate?

It is a wet-mate connector designed for underwater connection and disconnection with its compatible female connector.

Q5: What is the difference between MCOM4M and MCIL4M?

MCOM4M is factory overmoulded directly onto the cable, while MCIL4M is a conventional inline cable connector requiring a separate cable termination arrangement.

Q6: What is the voltage rating?

The published reference specification identifies 300 V DC/AC RMS.

Q7: What is the current rating?

The reference specification identifies 10 A per contact, with a maximum total connector current of 20 A.

Q8: What is the pressure rating?

The published reference specification identifies 1,400 bar when mated and 800 bar open-face. Actual HYSF ratings require qualification.

Q9: What materials are used?

The reference configuration uses a chloroprene rubber overmould body and gold-plated beryllium copper male contacts.

Q10: How many mating cycles are supported?

The published reference specification identifies more than 500 wet-mating cycles.

Q11: Can the cable length be customized?

Yes. Cable length, outer diameter, conductor specifications, and cable jacket requirements can be evaluated according to OEM requirements.

Q12: Is the MCOM4M compatible with SubConn Micro Circular connectors?

The reference product is advertised as SubConn Micro Circular compatible. Exact mechanical and electrical interchangeability should be verified using the mating drawings and sample testing.

Q13: Can the MCOM4M be used for permanent subsea installations?

Yes. Its factory overmoulded cable entry is particularly suitable for permanent and semi-permanent subsea cable assemblies.

Why Choose HYSF SUBSEA MCOM4M?

The HYSF SUBSEA MCOM4M 4-Pin Male Micro Circular Overmould Connector provides a compact and reliable underwater cable connection solution.Its principal features include:

• Four-pin male contact configuration
• Micro Circular connector interface
• Factory overmoulded cable construction
• Wet-mate connection capability
• 300 V reference voltage rating
• 10 A per contact reference rating
• 20 A maximum connector current reference
• 1,400 bar mated pressure reference
• 800 bar open-face pressure reference
• More than 500 wet-mating cycles (Reference)
• Gold-plated beryllium copper contacts
• Chloroprene rubber overmould body
• Integrated cable strain relief
• ABS or stainless steel locking sleeve options
• Customized cable assemblies
• Electrical and hydrostatic testing options

For ROV manufacturers, AUV developers, marine robotics companies, subsea instrumentation manufacturers, and offshore engineering organizations, the MCOM4M offers a compact overmoulded electrical connection for demanding underwater applications.