IL25M 25-Pin Male Inline Underwater Connector – SubConn Compatible Standard Circular Series
Product Overview
The
HYSF SUBSEA IL25M 25-Pin Male Inline Underwater Connector is a high-density, wet-mateable subsea electrical connector designed for reliable multi-channel signal, control, and power connections in demanding marine environments.As part of the HYSF Standard Circular Connector Series, the IL25M features twenty-five electrical contacts, a molded neoprene rubber connector body, gold-plated contact surfaces, and an integrated underwater cable.The connector is designed for use in deep-sea electrical systems requiring multiple independent circuits within a single underwater mating interface.The Standard Circular series has a rated operating voltage of
550V AC/DC and a design depth capability of up to
6,000 meters (60 MPa), subject to qualification of the complete connector and cable assembly.The standard IL25M configuration has a nominal current rating of
5A per contact. The manufacturer’s series documentation also identifies selected higher-current contact configurations reaching 10A, depending on the specific contact arrangement. The exact permitted current for each contact must be confirmed against the approved technical drawing.The IL25M is normally supplied with approximately
1 meter of underwater cable, with customized cable lengths and electrical configurations available for different equipment requirements.Its mating interface is designed for compatibility with corresponding
SubConn and SEACON Standard Circular underwater connectors.The primary matching bulkhead connector is the
BH25F 25-Pin Female Bulkhead Underwater Connector.Typical applications include remotely operated vehicles (ROVs), autonomous underwater vehicles (AUVs), marine research instrumentation, sonar systems, hydrophone arrays, subsea monitoring platforms, offshore equipment, and underwater electronic control systems.
Key Features and Benefits
1. High-Density 25-Pin Male Electrical Interface
The IL25M incorporates twenty-five electrical contact positions within a single Standard Circular connector interface.Its high-density arrangement provides an efficient solution for underwater equipment requiring multiple electrical channels.Possible circuit applications include:
- Multiple underwater sensor signals
- Instrumentation and measurement circuits
- Electrical control connections
- Low-power distribution
- Marine monitoring equipment
- Auxiliary electrical functions
- Multi-channel acoustic instrumentation
- Underwater data acquisition systems
Using one 25-pin underwater connector can reduce the need for several separate electrical connectors.This can simplify cable routing and help reduce the number of connection interfaces in complex subsea systems.The actual pin assignments depend on the electrical requirements of the connected equipment.
2. 550V AC/DC Electrical Rating
The HYSF Standard Circular 25-pin connector family is designed for electrical applications requiring a rated voltage of up to
550V AC/DC.This makes the IL25M suitable for appropriately designed marine electrical systems operating within the specified connector and cable limits.The complete system voltage rating must also account for cable insulation, wire termination, connected equipment, and installation conditions.Operating voltage should never exceed the lowest-rated component of the completed electrical assembly.
3. 5A Nominal Contact Rating with Configuration-Dependent Higher-Current Options
The IL25M differs from the Standard Circular 12-pin and 16-pin configurations.While the standard 12-pin and 16-pin models have a nominal current rating of 10A per contact, the 25-pin model is listed with a
5A nominal contact rating.The manufacturer’s series catalog also identifies selected contact configurations with ratings up to 10A.These higher-current capabilities should not be applied automatically to every one of the twenty-five contact positions.Actual current capacity depends on:
- Contact size and configuration
- Cable conductor cross-sectional area
- Number of simultaneously loaded contacts
- Electrical termination quality
- Operating temperature
- Cable construction
- Heat dissipation
- Installation conditions
For designs requiring continuous current above 5A on any contact, the approved contact-specific rating and complete cable assembly should be verified.
4. SubConn and SEACON Compatible Standard Circular Design
The IL25M belongs to the HYSF Standard Circular underwater connector family.This series is designed for mating compatibility with corresponding SubConn and SEACON Standard Circular connectors.Such compatibility can be useful when developing new underwater electrical equipment or replacing compatible subsea cable assemblies.Applications may include:
- Replacement underwater connectors
- ROV electrical system maintenance
- OEM subsea equipment
- Marine instrument upgrades
- Offshore monitoring systems
- Customized underwater cable assemblies
Before connecting the IL25M to another manufacturer’s product, verify the exact connector series, contact arrangement, gender, mating geometry, and retention mechanism.Matching contact count alone does not guarantee mechanical or electrical compatibility.
5. Deep-Sea Design Capability up to 6,000 Meters
The HYSF Standard Circular underwater connector series is designed for demanding subsea conditions involving high hydrostatic pressure.The series supports a design depth capability of up to
6,000 meters, corresponding to approximately
60 MPa.This makes the IL25M suitable for consideration in applications such as:
- Deep-sea exploration
- Seabed scientific research
- Offshore underwater monitoring
- Subsea robotic systems
- Oceanographic instruments
- Deep-water sensor networks
The connector’s molded construction helps protect the internal electrical termination from seawater exposure.However, operating depth must be verified for the complete connector assembly, including the cable, molded termination, mating connector, and applicable environmental qualification.
6. Wet-Mateable Underwater Interface
The IL25M is part of the HYSF wet-mateable Standard Circular connector family.Its interface is designed to support underwater connection and disconnection under the applicable operating procedures.Wet-mateable connector technology can be advantageous for modular marine equipment, removable underwater instruments, and subsea maintenance operations.
Important: Wet-mateable does not automatically mean that a connector may be connected or disconnected while electrically energized.Electrical power should be isolated before mating or unmating unless the complete assembly has been specifically qualified for energized operation.
7. Molded Neoprene Rubber Construction
The standard IL25M features a molded neoprene rubber connector body.Neoprene is commonly used in underwater connector applications because of its flexibility, mechanical resilience, and suitability for marine exposure.The molded construction provides an integrated transition between the electrical contact interface and the attached underwater cable.Its principal benefits include:
- Watertight molded design
- Mechanical protection of electrical terminations
- Flexible cable connection
- Suitability for seawater environments
- Integrated connector and cable construction
Proper cable support remains essential.Excessive pulling, twisting, or repeated sharp bending near the molded termination should be avoided.
8. Gold-Plated Electrical Contacts
The IL25M uses gold-plated electrical contact surfaces.Gold plating helps provide reliable electrical contact performance while reducing oxidation of the contact surface.This is especially important for subsea instrumentation systems requiring stable electrical continuity.Before mating, users should inspect the contacts and mating surfaces for contamination, damage, or abnormal wear.Regular cleaning and correct connector handling help preserve performance during repeated use.
9. Standard 1-Meter Underwater Cable
The standard IL25M is normally supplied with approximately
1 meter of integrated underwater cable.This configuration provides a practical cable-mounted electrical connection for many marine applications.Customized cable assemblies can be specified according to equipment requirements.Possible options include:
- Custom cable lengths
- Alternative conductor sizes
- Shielded cable construction
- Twisted-pair cable arrangements
- Customized pin assignments
- Special cable outer diameters
- Alternative cable jacket materials
- Open-ended wire terminations
- Connector-to-connector cable assemblies
- OEM underwater wiring harnesses
The selected cable must be suitable for the intended electrical load, operating depth, and mechanical installation.
IL25M Technical Specifications
| Parameter | Specification |
|---|
| Brand | HYSF SUBSEA |
| Model Number | IL25M |
| Connector Series | Standard Circular |
| Connector Type | Male Inline Underwater Connector |
| Number of Contacts | 25 |
| Contact Gender | Male |
| Contact Finish | Gold-Plated |
| Connector Body | Molded Neoprene Rubber |
| Rated Voltage | 550V AC/DC |
| Nominal Rated Current | 5A per Contact |
| Higher-Current Options | Up to 10A on Selected Configurations, Subject to Confirmation |
| Design Depth Capability | Up to 6,000 Meters |
| Pressure Capability | Up to 60 MPa |
| Mating Type | Wet-Mateable |
| Standard Cable Length | 1 Meter |
| Customized Cable Lengths | Available |
| Primary Mating Bulkhead | BH25F |
| Corresponding Female Inline Connector | IL25F |
| Protective Dummy Plug for IL25M | DC25F |
| Protective Dummy Plug for BH25F | DC25M |
| Compatibility | Corresponding SubConn and SEACON Standard Circular Interfaces |
| Warranty | 12 Months |
Engineering Note: The nominal current rating for the 25-pin configuration is 5A per contact. Any higher-current contact arrangement must be verified against the approved connector drawing and cable specifications.
25-Pin Wiring Configuration and Cable Identification
The HYSF Standard Circular 25-pin connector family provides a high-density conductor arrangement for multi-channel underwater electrical applications.Depending on the selected cable construction, the assembly may include individual conductors and twisted-pair wiring arrangements.Twisted-pair constructions can be useful in suitable signal applications because they help control electromagnetic interference and improve circuit organization.However, the electrical performance of a twisted-pair cable depends on its complete construction, including pair geometry, shielding, impedance, and termination.The presence of twisted pairs alone does not guarantee compatibility with a particular Ethernet or other high-speed communication standard.
Pin-to-Wire Identification
The twenty-five contact positions should be identified according to the approved connector wiring drawing.Cable conductor colors may vary with the selected cable construction or custom wiring configuration.For reliable installation:
- Confirm the connector pin numbering using the correct mating-face orientation.
- Verify the wire color or conductor identification for each contact.
- Check the approved pin-to-wire assignment.
- Perform an electrical continuity test before equipment integration.
- Document any customized wiring arrangement.
The final pin-to-wire mapping should be based on the approved production drawing rather than assumed from a general-purpose color sequence.
Compatible Connectors and Accessories
BH25F – 25-Pin Female Bulkhead Underwater Connector
The
BH25F is the primary female bulkhead mating connector for the IL25M.It is designed for installation through an underwater equipment enclosure or marine pressure housing.The standard BH25F configuration features a metal housing and an internal electrical termination arrangement.The corresponding Standard Circular 12/16/25-pin bulkhead family specifies:
- Mounting Thread: 3/4-16 UNF-2A
- Nominal Thread Length: 25 mm
- Base Mounting Radius: 32.4 mm
- Sealing Surface Roughness: Ra 1.6
These dimensions belong to the BH25F bulkhead connector, not the IL25M inline connector.The final bulkhead installation drawing should always be checked before machining the equipment enclosure.
Normal electrical configuration:IL25M Male Inline Connector + BH25F Female Bulkhead Connector
IL25F – 25-Pin Female Inline Underwater Connector
The
IL25F is the corresponding female inline cable connector within the same Standard Circular family.A compatible IL25M and IL25F mating configuration may be used for appropriate cable-to-cable connections when the mating interfaces and locking arrangements are correctly specified.Such configurations can be useful for modular underwater cabling and suitable cable extension assemblies.
DC25F – 25-Pin Female Dummy Plug
The
DC25F is the corresponding female protective dummy plug for compatible male connector interfaces.It can help protect the IL25M male mating interface when the operational cable is disconnected, subject to the applicable mating and retention arrangement.The dummy plug is a protective accessory and does not provide electrical power or signal transmission.
DC25M – 25-Pin Male Dummy Plug
The
DC25M is the corresponding male protective dummy plug for compatible female connector interfaces, including the BH25F female bulkhead.When the IL25M is disconnected from the BH25F, the DC25M can help protect the female bulkhead interface.The environmental and pressure capability of a dummy-plugged connection should be verified for the intended deployment conditions.
IL25M vs. IL25F
The IL25M and IL25F belong to the same Standard Circular 25-pin connector family.Their primary difference is the electrical contact gender.
| Feature | IL25M | IL25F |
|---|
| Connector Type | Male Inline | Female Inline |
| Contact Count | 25 | 25 |
| Contact Gender | Male | Female |
| Nominal Current Rating | 5A per Contact | 5A per Contact |
| Rated Voltage | 550V AC/DC | 550V AC/DC |
| Standard Cable Length | 1 Meter | 1 Meter |
| Primary Mating Bulkhead | BH25F | BH25M |
| Protective Dummy Plug | DC25F | DC25M |
Both models can be supplied with appropriate customized cable configurations.
Typical Applications
1. Remotely Operated Vehicles (ROVs)
ROVs often require numerous electrical connections for sensors, navigation equipment, monitoring modules, and auxiliary control systems.The IL25M can provide a high-density cable interface for suitable multi-channel ROV applications.Using a 25-pin connector may reduce the need for multiple separate cable connections.
2. Autonomous Underwater Vehicles (AUVs)
AUVs frequently use modular electronic equipment and external scientific sensors.The IL25M provides a detachable underwater electrical interface for appropriate AUV instrument and control circuits.Its multi-contact configuration supports flexible allocation of electrical channels.
3. Sonar and Hydrophone Arrays
Sonar systems and hydrophone arrays may require numerous low-level signal connections.The IL25M can provide a multi-contact underwater interface for appropriately designed acoustic instrumentation.Cable shielding, grounding, conductor pairing, and electromagnetic compatibility must be considered for sensitive acoustic measurement circuits.
4. Oceanographic Instruments
Marine research instruments frequently require electrical connections for sensors, measurement circuits, and auxiliary systems.The IL25M can be integrated into suitable:
- Oceanographic data acquisition systems
- Marine environmental monitoring platforms
- Underwater acoustic instruments
- Scientific sensor arrays
- Seabed measurement equipment
- Deep-water research instruments
5. Underwater Cameras and Imaging Systems
Subsea imaging equipment may require multiple electrical circuits for power, controls, and auxiliary sensors.The IL25M provides a high-density connector interface for suitable camera and imaging system wiring.Compatibility with high-speed digital communications must be established through complete cable and system-level evaluation.
6. Offshore Monitoring Equipment
Offshore monitoring platforms and subsea instrumentation systems often require dependable electrical connections under challenging marine conditions.The IL25M can provide a multi-channel interface for suitable monitoring and control applications.
7. Marine Research and Testing Equipment
Research organizations and underwater equipment manufacturers may require customized cable assemblies for specialized instruments.The IL25M provides a configurable underwater connector platform for suitable marine research, prototype, and testing systems.
Installation and Handling Guidelines
Step 1: Confirm the Mating Connector
Verify that the selected female connector has a compatible Standard Circular 25-pin interface.The primary mating bulkhead is BH25F.
Step 2: Inspect the Connector
Check the molded body, male contacts, cable jacket, and termination area for visible damage.
Step 3: Clean the Mating Interface
Ensure the connector face is free from sand, sediment, salt deposits, and foreign particles.
Step 4: Isolate Electrical Power
Disconnect electrical power before mating or unmating unless energized operation has been specifically qualified.
Step 5: Align the Connector
Align the IL25M with its corresponding female connector.Avoid excessive force or incorrect orientation.
Step 6: Complete the Mating Operation
Follow the approved mating procedure and secure any required locking component.
Step 7: Protect the Cable
Provide suitable cable support and avoid sharp bends or excessive mechanical loading near the molded termination.
Step 8: Verify Electrical Connections
Confirm the actual wiring assignments through the approved drawing and electrical continuity testing.For critical subsea applications, verify the complete assembly against the specified pressure and environmental requirements.
Quality Control and Testing
HYSF SUBSEA manufactures underwater electrical connectors and customized subsea cable assemblies for demanding marine environments.Depending on the product configuration and project requirements, testing and quality verification may include:
- Hydrostatic pressure testing
- Electrical continuity testing
- Insulation resistance testing
- Dielectric withstand testing
- Contact inspection
- Dimensional verification
- Cable termination inspection
- Wiring identification verification
- Mechanical integrity evaluation
The required acceptance criteria depend on the approved product configuration and operating conditions.
Frequently Asked Questions
Q1: What is the IL25M?
The IL25M is a 25-pin male inline underwater electrical connector belonging to the HYSF Standard Circular Series.
Q2: Which bulkhead connector mates with IL25M?
The primary mating bulkhead is
BH25F, a 25-pin female underwater bulkhead connector.
Q3: Is IL25M compatible with SubConn?
The IL25M is designed for mating compatibility with corresponding SubConn Standard Circular 25-pin connector interfaces. Exact compatibility should be verified.
Q4: What is the rated current?
The nominal rated current is
5A per contact. Selected higher-current configurations may support up to 10A, subject to approved contact-specific specifications.
Q5: What is the rated voltage?
The Standard Circular series is rated for
550V AC/DC.
Q6: What is the maximum operating depth?
The series has a design depth capability of up to
6,000 meters (60 MPa), subject to qualification of the completed connector assembly.
Q7: Is IL25M wet-mateable?
Yes. It belongs to the HYSF wet-mateable Standard Circular connector family. Power should be isolated before mating or unmating unless otherwise qualified.
Q8: What is the standard cable length?
The standard IL25M is normally supplied with approximately
1 meter of underwater cable.
Q9: Can the cable length be customized?
Yes. Customized cable lengths, conductor configurations, and termination arrangements are available.
Q10: Is IL25M the same as IL16M?
No. IL25M has twenty-five contacts and a nominal current rating of 5A per contact.IL16M has sixteen contacts and a catalog current rating of 10A per contact.Their contact layouts and mating interfaces are different.
Q11: Does IL25M have a mounting thread?
No. IL25M is an inline cable connector.The corresponding BH25F bulkhead belongs to the Standard 12/16/25-pin mounting family, which specifies a 3/4-16 UNF-2A thread.
Q12: Which dummy plug protects IL25M?
The corresponding protective accessory is the
DC25F 25-Pin Female Dummy Plug, subject to the appropriate mating configuration.
Q13: Which dummy plug protects BH25F?
The corresponding protective accessory is the
DC25M 25-Pin Male Dummy Plug.
Q14: Can IL25M carry power and signals simultaneously?
The contacts can be allocated to suitable power, control, and signal circuits within the approved electrical specifications.The complete system must be evaluated for current loading, conductor sizing, shielding, and interference.
Q15: Can IL25M support Ethernet communication?
The 25-pin configuration provides sufficient contact positions for many possible wiring arrangements, but contact count alone does not guarantee Ethernet compatibility.The complete cable assembly must satisfy the required impedance, pairing, shielding, and signal performance specifications.
Why Choose HYSF SUBSEA IL25M?
The
HYSF SUBSEA IL25M 25-Pin Male Inline Underwater Connector provides a high-density electrical interface for professional marine and subsea equipment.Its principal advantages include:
- Twenty-five electrical contact positions
- SubConn-compatible Standard Circular mating interface
- Wet-mateable connector construction
- Nominal 5A per contact rating
- Selected higher-current configurations subject to verification
- 550V AC/DC rated voltage
- Design depth capability up to 6,000 meters
- Molded neoprene rubber connector body
- Gold-plated electrical contacts
- Standard 1-meter underwater cable
- Compatible BH25F female bulkhead connector
- Corresponding DC25F protective dummy plug
- Customized cable lengths and wiring arrangements
- OEM subsea cable assembly options
- 12-month product warranty
For underwater robotics, sonar systems, oceanographic instruments, offshore monitoring equipment, and marine research applications, the IL25M provides a practical solution for consolidating multiple electrical circuits into one underwater connection.Its high contact density, molded watertight construction, and Standard Circular compatibility make it suitable for demanding subsea electrical integration projects.
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