BH12F 12-Pin Female Bulkhead Underwater Connector – SubConn-Compatible 6000m

Product Overview

The HYSF SUBSEA BH12F is a 12-pin female bulkhead underwater connector designed for reliable electrical connections through pressure housings, subsea equipment enclosures, and marine instrumentation panels.As part of the HYSF Standard Circular connector family, the BH12F combines a corrosion-resistant metal housing, twelve electrical contacts, and a sealed bulkhead mounting configuration to provide dependable electrical interfaces in demanding underwater environments.The connector is primarily designed to mate with the IL12M 12-pin male inline underwater connector.Its twelve-contact design allows multiple electrical circuits to pass through a single enclosure interface, reducing the number of individual connection points required in complex subsea systems.The BH12F is suitable for power distribution, control signals, sensor interfaces, and underwater instrumentation applications, subject to the electrical requirements of the complete system.The Standard Circular series is rated for 550V AC/DC, 10A per contact, and operating depths up to 6000 meters (60 MPa) when installed in an appropriately qualified assembly.The standard BH12F configuration features a 316L stainless steel housing and approximately 0.3 meters of internal wire leads.Its mating interface is designed for compatibility with corresponding SubConn and SEACON Standard Circular connector configurations.Typical applications include ROVs, AUVs, underwater sensors, sonar equipment, offshore instrumentation, marine research systems, and subsea monitoring installations.

Key Features and Benefits

1. Twelve Electrical Contacts

The BH12F provides twelve female electrical contacts within a single bulkhead connector.This allows engineers to route multiple electrical circuits through one pressure housing interface.Possible applications include:

• Instrumentation signals
• Equipment control circuits
• Low-voltage power distribution
• Sensor connections
• Auxiliary electrical functions
• Suitable communication interfaces

A multi-contact bulkhead connector can help simplify equipment layout and reduce the number of separate penetrations required in an underwater enclosure.Actual circuit allocation must be designed according to voltage, current, signal integrity, and conductor requirements.

2. Bulkhead Mounting Configuration

The BH12F is designed for installation through the wall of a compatible underwater enclosure or pressure housing.Unlike an inline cable connector, the bulkhead configuration provides a fixed interface between the internal electrical system and an external mating cable assembly.The threaded mounting arrangement allows the connector to be secured to a properly machined installation location.The housing sealing components help maintain the environmental integrity of the installation when correctly assembled.Mounting dimensions, thread specifications, sealing surfaces, and installation clearances must be confirmed using the drawing for the exact ordered variant.

3. 316L Stainless Steel Housing

The standard BH12F features a marine-grade 316L stainless steel housing.316L stainless steel is widely used in marine equipment because of its corrosion resistance and mechanical durability.It is suitable for many applications involving seawater exposure and demanding marine environments.For equipment with specific material requirements, anodized aluminum configurations may also be available.Material selection should consider the enclosure material, operating environment, and potential galvanic corrosion.

4. Wet-Mateable Connector Interface

The BH12F belongs to the HYSF wet-mateable Standard Circular connector family.It is designed to mate with the corresponding IL12M male inline connector.Wet-mateable construction is valuable for underwater equipment that requires periodic connection or disconnection.This includes modular ROV equipment, removable scientific instruments, and subsea inspection systems.Important: The electrical circuit should be isolated before mating or unmating. Wet-mateable does not automatically mean suitable for energized connection.

5. Deep-Sea Pressure Capability

The HYSF Standard Circular connector family is designed for depths up to 6000 meters, equivalent to approximately 60 MPa hydrostatic pressure.The BH12F is intended for pressure-resistant subsea installations when used with the correct mating connector, sealing arrangement, and enclosure interface.The overall pressure capability depends on the complete installed assembly, including the connector, mounting seal, housing wall, and cable connection.

6. Gold-Plated Electrical Contact Interface

The connector uses gold-plated electrical contacts designed to provide stable electrical connectivity.Gold plating helps minimize surface oxidation and supports reliable contact performance when connectors are correctly maintained.The contact design is suitable for applications requiring repeated electrical connections in marine environments.

7. SubConn and SEACON Compatibility

The HYSF Standard Circular series is designed for mating compatibility with corresponding SubConn and SEACON connector configurations.The BH12F offers an alternative for compatible 12-pin female bulkhead applications.Before replacement or integration, verify:

• Connector series
• Number of contacts
• Contact gender
• Mating dimensions
• Contact arrangement
• Installation thread
• Sealing requirements

Compatibility with the mating face does not by itself confirm compatibility with an existing panel cutout or mounting thread.

8. Internal Wire Leads

The standard BH12F configuration includes approximately 0.3 meters of internal wire leads.These leads connect the bulkhead connector to the internal electrical equipment.Customized wire lengths and termination arrangements may be available to meet specific installation requirements.Wire identification should follow the approved wiring drawing for the ordered configuration.

Technical Specifications

Parameter	Specification
Brand	HYSF SUBSEA
Model	BH12F
Product Type	Female Bulkhead Underwater Connector
Connector Series	Standard Circular
Contact Configuration	12-Pin Female
Rated Voltage	550V AC/DC
Rated Current	10A per Contact
Standard Depth Rating	6000m / 60 MPa
Mating Type	Wet-Mateable
Standard Housing Material	316L Stainless Steel
Alternative Housing Material	Anodized Aluminum, Subject to Configuration
Contact Finish	Gold-Plated
Standard Internal Wire Length	0.3m
Primary Mating Connector	IL12M
Protective Dummy Plug	DC12M
Mounting Type	Threaded Bulkhead
Mounting Thread	Confirm Against the Exact Product Drawing
Mounting Accessories	Nut, Washer, and O-Ring According to the Approved Configuration
Series Compatibility	Corresponding SubConn / SEACON Standard Circular
Warranty	12 Months

Mounting thread clarification: The current BH12F product listing specifies 5/8-18 UNF, while the Standard 12/16/25-pin family drawing specifies 3/4-16 UNF-2A with a nominal 25 mm thread length. These configurations should not be assumed interchangeable. The final mounting thread and installation dimensions must be verified against the approved drawing before machining the enclosure.

Bulkhead Installation and Sealing

A properly installed underwater bulkhead connector must provide both electrical connectivity and environmental sealing.The BH12F is designed to be mounted through a machined opening in the enclosure wall.The installed connector provides an electrical interface between the external cable assembly and the internal equipment.

Housing Material

The standard 316L stainless steel configuration is suitable for many marine installations.Where the enclosure is manufactured from aluminum alloy, material compatibility and galvanic corrosion should be considered.Appropriate surface treatment, insulation, and corrosion protection may be required depending on the installation.

O-Ring Sealing

The mounting seal helps prevent seawater from entering through the connector installation interface.Correct sealing depends on:

• O-ring material and dimensions
• Groove geometry
• Surface finish
• Enclosure wall thickness
• Correct installation
• Absence of mechanical damage

Always follow the approved installation drawing.

Threaded Installation

The BH12F uses a threaded bulkhead mounting arrangement.The enclosure must be machined to match the specified connector thread and sealing geometry.Do not select the panel cutout based only on the product name or number of contacts.The exact mounting dimensions should be confirmed before production.

Internal Wire Routing

The standard internal leads are approximately 0.3 meters long.The leads should be routed carefully to avoid excessive bending, abrasion, or tensile loading.Wire connections should be protected according to the equipment’s electrical and environmental requirements.

Standard 12-Pin Cable Wiring Reference

The corresponding HYSF Standard Circular 12-pin inline cable family uses the following standard color identification sequence.

Pin Number	Standard Inline Cable Color
1	Red
2	Red/White
3	Black
4	Black/White
5	Yellow
6	Yellow/White
7	Blue
8	Blue/White
9	Orange
10	Orange/White
11	Brown
12	Brown/White

Important: This is the standard inline cable color reference, not a guaranteed color sequence for the BH12F bulkhead pigtail.Bulkhead wire leads may use different colors or numbered identification sleeves depending on the production configuration.The actual BH12F pin-to-wire assignment should always be verified using the approved drawing and electrical continuity test.

Compatible Connectors and Accessories

The BH12F belongs to the HYSF Standard Circular 12-pin connector family.Its primary operational mating arrangement is:BH12F Female Bulkhead + IL12M Male Inline ConnectorRelated products include:

Model	Description	Function
BH12F	12-Pin Female Bulkhead Connector	Current Product
IL12M	12-Pin Male Inline Connector	Primary Operational Mating Connector
DC12M	12-Pin Male Dummy Plug	Protects BH12F
BH12M	12-Pin Male Bulkhead Connector	Opposite-Gender Bulkhead
IL12F	12-Pin Female Inline Connector	Mates with BH12M
DC12F	12-Pin Female Dummy Plug	Protects BH12M

BH12F and IL12M

The IL12M provides the external cable-mounted electrical connection for a compatible BH12F female bulkhead.This arrangement allows the underwater equipment to be connected to an external cable assembly.

BH12F and DC12M

When the operational cable is disconnected, the DC12M male dummy plug can be used to protect the exposed female connector interface.The dummy plug is a protective accessory and does not transmit electrical power or signals.

BH12F vs. BH12M

The BH12F and BH12M are corresponding female and male bulkhead connector configurations.

BH12F – Female Bulkhead

• 12-pin female interface
• Primarily mates with IL12M
• Protected by DC12M
• Designed for fixed enclosure installation

BH12M – Male Bulkhead

• 12-pin male interface
• Primarily mates with IL12F
• Protected by DC12F
• Designed for fixed enclosure installation

The connector gender must match the selected external cable assembly.

Typical Applications

ROV and AUV Systems

Remotely operated vehicles and autonomous underwater vehicles use bulkhead connectors to route electrical signals through pressure housings.The BH12F can provide a multi-contact interface for:

• Navigation instruments
• Auxiliary sensors
• Vehicle monitoring systems
• Equipment control circuits
• External electronic modules

Its twelve-contact design can help reduce the number of separate enclosure penetrations required.

Underwater Sonar and Acoustic Equipment

Sonar systems may require multiple electrical channels for power, control, and instrumentation.The BH12F provides a suitable connector interface when the wiring design and electrical requirements are correctly defined.Sensitive analog circuits may require additional shielding and grounding considerations.

Oceanographic Research Instruments

Marine research equipment frequently requires reliable electrical feedthroughs.The BH12F can be integrated into compatible enclosures for:

• CTD systems
• Temperature sensors
• Pressure sensors
• Marine data loggers
• Environmental monitoring equipment

Underwater Camera Systems

Subsea imaging equipment may require external cable connections for power and control.The BH12F can provide a fixed interface on the camera housing or an associated underwater electronics enclosure.

Offshore Energy and Monitoring

Offshore energy installations may use bulkhead connectors in subsea monitoring and control equipment.The BH12F offers a multi-contact electrical interface for suitable underwater instrumentation systems.

Subsea Inspection Equipment

Inspection and maintenance tools often use detachable electrical connections.The BH12F provides a fixed enclosure interface that can be connected to a matching inline cable assembly during operation.

Installation Guidelines

Step 1: Confirm the Approved Drawing

Verify the exact BH12F configuration before machining the enclosure.Check the mounting thread, sealing dimensions, installation depth, and mechanical clearances.

Step 2: Inspect the Enclosure

Check that the mounting surface meets the required dimensional and surface-finish specifications.The sealing area should be free from scratches, burrs, and contamination.

Step 3: Inspect the Connector

Check the metal housing, mating interface, internal leads, and sealing components for damage.

Step 4: Install the O-Ring

Install the correct O-ring according to the approved connector drawing.Avoid twisting, cutting, or overstretching the seal.

Step 5: Mount the Bulkhead Connector

Insert the connector into the prepared enclosure opening.Install the specified washer and locking nut.Use the approved installation procedure and tightening requirements.

Step 6: Route the Internal Wires

Route the internal pigtail leads to the corresponding electrical equipment.Avoid sharp bends, abrasion points, and excessive mechanical tension.

Step 7: Verify Electrical Connections

Check the wiring against the approved pin assignment.Confirm electrical continuity and the absence of unintended short circuits.

Step 8: Complete Sealing Verification

Before deployment, verify that the assembled enclosure meets the required pressure and sealing acceptance criteria.

Maintenance Recommendations

Inspect Before Mating

Check the connector interface for sand, dirt, salt deposits, and mechanical damage.

Keep the Connector Clean

Follow the recommended cleaning procedure after seawater exposure.

Protect Unused Interfaces

Use a compatible DC12M protective dummy plug when the operational cable is disconnected.

Inspect the Housing Seal

Check the mounting seal during scheduled equipment maintenance.Replace damaged or deteriorated sealing components.

Avoid Excessive Mechanical Loads

Support external cable assemblies to prevent unnecessary forces from being transferred to the bulkhead interface.

Perform Periodic Electrical Testing

For critical systems, periodic continuity and insulation resistance checks can help identify developing electrical issues.

Quality Control and Testing

HYSF SUBSEA manufactures underwater electrical connectors for demanding marine environments.Quality verification for applicable bulkhead connector assemblies can include:

• Hydrostatic pressure testing
• Electrical continuity testing
• Insulation resistance testing
• Dielectric withstand testing
• Contact resistance measurement
• Dimensional inspection
• Visual inspection
• Mating compatibility checks

The exact test procedure and acceptance criteria depend on the connector configuration and project requirements.For bulkhead installations, the condition of the mounting seal and enclosure interface is particularly important.

Frequently Asked Questions

1. What is the BH12F?

The BH12F is a Standard Circular 12-pin female bulkhead underwater connector designed for installation through an underwater enclosure or pressure housing.

2. Which connector mates with BH12F?

The primary corresponding inline connector is IL12M, the 12-pin male inline underwater connector.

3. Is BH12F compatible with SubConn?

The HYSF Standard Circular series is designed for mating compatibility with corresponding SubConn and SEACON Standard Circular configurations.The exact interface must be verified using the approved drawings.

4. What is the rated operating depth?

The Standard Circular series is rated for depths up to 6000 meters under the applicable qualified installation conditions.

5. What is the rated current?

The BH12F is rated for 10A per contact.The complete wiring and cable assembly must also support the intended electrical load.

6. What is the rated voltage?

The standard rated voltage is 550V AC/DC.

7. What is the standard housing material?

The standard housing material is 316L stainless steel.Anodized aluminum options may be available depending on the configuration.

8. How long are the internal wires?

The standard BH12F configuration includes approximately 0.3 meters of internal wire leads.

9. What is the mounting thread?

The exact thread must be confirmed against the approved product drawing.The current BH12F product listing specifies 5/8-18 UNF, while the Standard 12/16/25-pin family documentation specifies 3/4-16 UNF-2A.These dimensions are not interchangeable.

10. Can BH12F be wet-mated?

Yes. The BH12F belongs to the HYSF wet-mateable Standard Circular connector family.Electrical power should be isolated before mating or unmating.

11. Which dummy plug protects BH12F?

The corresponding protective accessory is DC12M, a 12-pin male dummy plug.

12. Does BH12F include mounting accessories?

The standard bulkhead kit includes the mounting nut, washer, and O-ring according to the approved connector configuration.

13. Can BH12F be installed in an aluminum enclosure?

Installation in an aluminum enclosure may be possible, but material compatibility, galvanic corrosion, sealing geometry, and mechanical requirements should be evaluated.

14. Can BH12F transmit Ethernet signals?

The BH12F provides twelve electrical contacts, but a particular Ethernet data rate is not guaranteed by contact count alone.The cable assembly and complete transmission system must be verified for the intended protocol.

Why Choose HYSF SUBSEA BH12F?

The HYSF BH12F combines a twelve-contact electrical interface with a durable bulkhead mounting configuration for demanding underwater applications.Its principal advantages include:

• 12-pin female Standard Circular interface
• SubConn and SEACON compatible mating design
• Wet-mateable construction
• 6000m standard depth rating
• 550V AC/DC rated voltage
• 10A per contact rated current
• Standard 316L stainless steel housing
• Approximately 0.3m internal wire leads
• Matching IL12M male inline connector
• Matching DC12M protective dummy plug
• Suitable for marine instrumentation, subsea robotics, and offshore equipment

The HYSF BH12F 12-Pin Female Bulkhead Underwater Connector provides a practical electrical feedthrough solution for subsea systems requiring multiple circuits through a sealed equipment enclosure.