BH12M 12-Pin Male Bulkhead Underwater Connector – SubConn-Compatible 6000m
Product Overview
The
HYSF SUBSEA BH12M is a 12-pin male bulkhead underwater connector designed to provide reliable electrical connections through subsea pressure housings, marine equipment enclosures, and underwater instrumentation panels.As part of the HYSF Standard Circular connector family, the BH12M combines a durable metal housing, twelve electrical contacts, and a sealed bulkhead mounting design for demanding underwater applications.The connector is primarily designed to mate with the
IL12F 12-pin female inline underwater connector.Its twelve-contact configuration provides a practical solution for systems requiring multiple electrical circuits through a single enclosure opening.The BH12M can support suitable power distribution, equipment control, sensor connections, and instrumentation circuits within the electrical limits 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 as part of an appropriately qualified assembly.The standard BH12M configuration features a
316L stainless steel housing and approximately
0.3 meters of internal wire leads.The connector is designed for mating compatibility with corresponding SubConn and SEACON Standard Circular interfaces.Typical applications include ROVs, AUVs, underwater sensors, sonar systems, offshore instrumentation, subsea monitoring equipment, and marine research platforms.
Key Features and Benefits
1. Twelve Male Electrical Contacts
The BH12M features twelve male electrical contacts within a single circular bulkhead interface.This allows multiple electrical circuits to be routed through one connector installation.Depending on the approved electrical configuration, the contacts can be allocated to:
- Sensor power connections
- Equipment control circuits
- Instrumentation channels
- Monitoring signals
- Auxiliary electrical functions
- Suitable communication interfaces
The twelve-contact design can help reduce the number of individual enclosure penetrations required in complex subsea equipment.Actual circuit allocation must account for voltage, current, conductor specifications, and signal integrity requirements.
2. Fixed Bulkhead Mounting Design
The BH12M is designed for installation through the wall of a pressure housing or underwater equipment enclosure.Unlike a cable-mounted inline connector, the bulkhead configuration provides a fixed electrical interface between the internal electronics and an external cable assembly.Its threaded mounting arrangement enables mechanical installation into a properly machined enclosure.The connector must be installed with the appropriate sealing components to maintain the integrity of the housing.Correct mounting dimensions, sealing geometry, and thread specifications should always be verified using the approved drawing for the exact connector variant.
3. Marine-Grade 316L Stainless Steel Housing
The standard BH12M uses a
316L stainless steel housing.316L stainless steel is widely used in marine equipment because of its corrosion resistance, mechanical strength, and durability.It is suitable for many seawater-exposed applications where the connector housing must withstand demanding environmental conditions.Alternative housing materials, including anodized aluminum, may be available for specific configurations.When selecting a connector for an aluminum enclosure, engineers should evaluate the risk of galvanic corrosion and select an appropriate installation method.
4. Wet-Mateable Connector Interface
The BH12M belongs to the HYSF Standard Circular wet-mateable connector family.It is designed to mate with the corresponding IL12F female inline connector.Wet-mateable construction supports underwater connection and disconnection under the applicable operating conditions.This is valuable for modular subsea equipment, underwater inspection tools, removable sensors, and marine research systems.
Important: Electrical power should be isolated before mating or unmating.Wet-mateable does not automatically mean the connector is suitable for hot-plugging under electrical load.
5. Deep-Sea Pressure Capability
The HYSF Standard Circular series is designed for operation at depths up to
6000 meters, equivalent to approximately
60 MPa hydrostatic pressure.The BH12M provides a suitable bulkhead interface for deep-water applications when used with the correct mating connector and installation arrangement.Overall pressure capability depends on the complete assembly, including:
- Bulkhead connector
- Enclosure wall
- Mounting seal
- Mating cable connector
- Electrical terminations
- Installation quality
All components must be suitable for the intended operating depth.
6. Gold-Plated Electrical Contacts
The BH12M features gold-plated electrical contacts designed to provide stable electrical connectivity.Gold plating helps reduce contact surface oxidation and supports reliable mating performance when the connector is properly maintained.Contact reliability is especially important for underwater systems where repair and replacement may require significant time and operational resources.
7. SubConn and SEACON Compatibility
The HYSF Standard Circular series is designed for mating compatibility with corresponding SubConn and SEACON Standard Circular configurations.The BH12M can therefore be considered for compatible replacement applications and new subsea equipment designs.Before installation, verify:
- Connector series
- Contact count
- Male/female configuration
- Contact arrangement
- Mating dimensions
- Mounting thread
- Sealing requirements
A compatible mating interface does not automatically guarantee that the bulkhead will fit an existing panel opening.
8. Internal Wire Lead Configuration
The standard BH12M is supplied with approximately
0.3 meters of internal wire leads.These leads connect the bulkhead interface to the electrical equipment inside the pressure housing.Custom lead lengths and termination arrangements can be configured for specific installation requirements.The actual wire identification should be verified against the approved production drawing.
Technical Specifications
| Parameter | Specification |
|---|
| Brand | HYSF SUBSEA |
| Model | BH12M |
| Product Type | Male Bulkhead Underwater Connector |
| Connector Series | Standard Circular |
| Contact Configuration | 12-Pin Male |
| 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 | IL12F |
| Protective Dummy Plug | DC12F |
| Mounting Type | Threaded Bulkhead |
| Series Mounting Thread | 3/4-16 UNF-2A for the Standard 12/16/25-Pin Configuration |
| Nominal Thread Length | 25mm for the Referenced Series Configuration |
| Mounting Accessories | Nut, Washer, and O-Ring According to Configuration |
| Compatibility | Corresponding SubConn / SEACON Standard Circular |
| Warranty | 12 Months |
Installation note: The Standard Circular product range includes more than one 12-pin dimensional grouping. The mounting thread and installation dimensions must be confirmed against the drawing of the exact BH12M version before machining an enclosure.
Bulkhead Installation and Housing Sealing
A bulkhead connector must provide reliable electrical connections while maintaining the environmental integrity of the equipment housing.The BH12M is designed for installation through a machined opening in the enclosure wall.
Threaded Mounting
The connector uses a threaded mounting arrangement.The Standard 12/16/25-pin family documentation specifies a
3/4-16 UNF-2A mounting thread and a nominal
25mm thread length.These values apply to the referenced series configuration and should be verified against the exact product drawing.The mating dimensions of different 12-pin connector variants should not be assumed interchangeable.
O-Ring Sealing
The bulkhead sealing system helps prevent seawater ingress at the connector installation interface.Effective sealing depends on:
- Correct O-ring selection
- Proper groove dimensions
- Suitable sealing surface finish
- Correct housing wall thickness
- Appropriate tightening procedure
- Undamaged sealing components
The approved installation drawing should be followed.
Housing Material Compatibility
The standard 316L stainless steel housing provides good resistance to many marine environments.When installed in an aluminum enclosure, the potential for galvanic corrosion should be considered.Appropriate material selection, protective coatings, and electrical isolation may be necessary depending on the application.
Internal Wire Routing
The BH12M includes approximately 0.3 meters of internal leads in its standard configuration.These leads should be routed to the internal electrical equipment without excessive bending, tension, or abrasion.Wire terminations should follow the approved electrical design.
Standard 12-Pin Cable Wiring Reference
The corresponding HYSF Standard Circular 12-pin inline cable family uses the following standard wire 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 table describes the standard inline cable color sequence. It should not automatically be applied to the BH12M bulkhead pigtail.The BH12M internal leads may use different wire colors or numbered identification sleeves depending on the production configuration.The actual pin-to-wire assignment must be confirmed using the approved wiring drawing and continuity test.
Compatible Connectors and Accessories
The BH12M is part of the HYSF Standard Circular 12-pin connector family.The primary operational mating arrangement is:
BH12M Male Bulkhead + IL12F Female Inline ConnectorRelated products include:
| Model | Product Description | Main Function |
|---|
| BH12M | 12-Pin Male Bulkhead Connector | Current Product |
| IL12F | 12-Pin Female Inline Connector | Primary Mating Cable Connector |
| DC12F | 12-Pin Female Dummy Plug | Protects BH12M |
| BH12F | 12-Pin Female Bulkhead Connector | Opposite-Gender Bulkhead |
| IL12M | 12-Pin Male Inline Connector | Mates with BH12F |
| DC12M | 12-Pin Male Dummy Plug | Protects BH12F |
BH12M and IL12F
The IL12F provides the operational cable-mounted connection to the BH12M male bulkhead.This arrangement allows electrical signals and suitable power circuits to pass between external underwater equipment and internal electronics.
BH12M and DC12F
When the operational cable connector is disconnected, the DC12F female dummy plug can be installed to help protect the exposed BH12M male interface.The dummy plug is intended for protection and does not transmit electricity.
BH12M vs. BH12F
The BH12M and BH12F are corresponding male and female bulkhead configurations.
BH12M – Male Bulkhead Connector
- 12-pin male interface
- Primarily mates with IL12F
- Protected by DC12F
- Fixed enclosure installation
BH12F – Female Bulkhead Connector
- 12-pin female interface
- Primarily mates with IL12M
- Protected by DC12M
- Fixed enclosure installation
Both belong to the Standard Circular family, but the contact gender and mating arrangement must be selected correctly.
Typical Applications
ROV and AUV Systems
Remotely operated vehicles and autonomous underwater vehicles require reliable electrical interfaces between internal electronics and external equipment.The BH12M can provide a multi-contact bulkhead connection for:
- Navigation sensors
- Monitoring instruments
- Auxiliary control circuits
- External electronic modules
- Equipment status signals
Its twelve-contact design may reduce the number of enclosure penetrations required.
Underwater Sonar and Acoustic Systems
Sonar and acoustic instrumentation may require multiple conductors for power, control, and measurement circuits.The BH12M provides a fixed interface through the equipment housing.For sensitive analog signals, appropriate shielding, grounding, and cable design should be considered.
Oceanographic Research Instruments
Marine scientific equipment frequently uses underwater electrical feedthroughs.Possible applications include:
- CTD instruments
- Temperature sensors
- Pressure sensors
- Scientific monitoring equipment
- Marine data acquisition systems
The BH12M can support suitable multi-contact interfaces in these systems.
Underwater Cameras and Observation Equipment
Subsea imaging systems may use bulkhead connectors for power and control connections.The BH12M can be installed in a compatible camera housing or electronics enclosure.Transmission compatibility must be verified for the particular imaging system and cable assembly.
Offshore Energy and Monitoring Systems
Offshore energy equipment may require underwater electrical connections for condition monitoring and control.The BH12M offers a fixed bulkhead interface for appropriately designed subsea systems.
Subsea Inspection Equipment
Inspection tools and removable underwater instruments may require a combination of fixed bulkhead connectors and detachable cables.The BH12M provides a mating interface for compatible IL12F cable assemblies.
Installation Guidelines
Step 1: Confirm the Exact Product Drawing
Before machining the enclosure, confirm the mounting thread, sealing dimensions, and panel requirements.Do not assume that all Standard Circular 12-pin variants have identical installation dimensions.
Step 2: Prepare the Enclosure
Machine the mounting opening according to the approved drawing.Inspect the sealing surface for burrs, scratches, and dimensional errors.
Step 3: Inspect the Connector
Check the metal housing, contacts, sealing components, and internal wire leads for visible damage.
Step 4: Install the O-Ring
Use the specified O-ring and follow the approved installation procedure.Avoid twisting or damaging the sealing component.
Step 5: Mount the Bulkhead
Insert the BH12M into the prepared mounting opening.Install the appropriate washer and locking nut.Follow the approved tightening requirements.
Step 6: Route the Internal Leads
Route the internal pigtail wires to the connected electronics.Avoid excessive tension, abrasion, and sharp bends.
Step 7: Verify Electrical Wiring
Confirm the actual pin-to-wire assignments against the approved drawing.Check continuity and ensure there are no unintended electrical shorts.
Step 8: Verify Sealing Integrity
Before underwater deployment, confirm that the completed enclosure assembly meets the required sealing and pressure acceptance criteria.
Maintenance Recommendations
Inspect Before Connection
Check the male mating interface for dirt, sand, salt deposits, and physical damage.
Clean After Seawater Exposure
Follow the recommended connector cleaning and drying procedure after marine use.
Protect the Unused Interface
Install a compatible DC12F dummy plug when the IL12F cable is disconnected.
Inspect the Mounting Seal
Check the O-ring and installation interface during scheduled maintenance.Replace damaged sealing components.
Avoid Excessive Mechanical Loads
Support the external cable assembly so that bending and tensile forces are not transferred directly to the bulkhead connection.
Perform Electrical Checks
For critical installations, periodic continuity and insulation resistance testing can help identify potential wiring or connector problems.
Quality Control and Testing
HYSF SUBSEA manufactures underwater electrical connectors for marine and subsea environments.Quality verification for applicable 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 testing requirements and acceptance criteria depend on the specific product configuration and installation conditions.For bulkhead applications, the mounting seal and enclosure interface should be included in the overall system qualification.
Frequently Asked Questions
1. What is the BH12M?
The BH12M is a 12-pin male bulkhead underwater connector from the HYSF Standard Circular series.It is designed for installation through underwater equipment enclosures and pressure housings.
2. Which connector mates with BH12M?
The primary mating connector is
IL12F, the 12-pin female inline underwater connector.
3. Is BH12M compatible with SubConn?
The HYSF Standard Circular series is designed for mating compatibility with corresponding SubConn and SEACON configurations.Exact mechanical compatibility should be verified using the approved drawings.
4. What is the depth rating?
The Standard Circular series is designed for depths up to 6000 meters under the applicable qualified installation conditions.
5. What is the rated voltage?
The standard rated voltage is 550V AC/DC.
6. What is the rated current?
The rated current is 10A per contact.The wiring and complete cable assembly must also be suitable for the intended electrical load.
7. What material is used for the housing?
The standard housing material is 316L stainless steel.Alternative materials may be available for specific configurations.
8. How long are the internal wires?
The standard BH12M configuration includes approximately 0.3 meters of internal wire leads.
9. What is the mounting thread?
The Standard 12/16/25-pin family documentation specifies 3/4-16 UNF-2A.However, the exact BH12M mounting dimensions should be confirmed against the approved product drawing because multiple 12-pin dimensional configurations are listed within the wider Standard Circular range.
10. Is BH12M wet-mateable?
Yes. The BH12M belongs to the HYSF wet-mateable Standard Circular connector family.Electrical power should be isolated before mating or unmating.
11. Which dummy plug protects BH12M?
The corresponding protective accessory is
DC12F, a 12-pin female dummy plug.
12. Does BH12M include mounting accessories?
The standard bulkhead kit includes the specified mounting nut, washer, and O-ring according to the approved connector configuration.
13. Can BH12M be installed in an aluminum housing?
Installation may be possible, but material compatibility, galvanic corrosion, sealing geometry, and mechanical requirements should be evaluated.
14. Can BH12M support Ethernet?
The BH12M provides twelve electrical contacts, but compatibility with a specific Ethernet data rate is not guaranteed by contact count alone.Cable construction, impedance, shielding, and complete system performance must be verified.
Why Choose HYSF SUBSEA BH12M?
The HYSF BH12M provides a twelve-contact electrical interface with a durable bulkhead mounting configuration for demanding underwater applications.Its key advantages include:
- 12-pin male Standard Circular configuration
- 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 IL12F female inline connector
- Matching DC12F protective dummy plug
- Suitable for subsea robotics, marine research, and offshore instrumentation
The
HYSF BH12M 12-Pin Male Bulkhead Underwater Connector provides a practical solution for routing multiple electrical circuits through sealed subsea equipment enclosures.
