3 Pin Micro Circular Underwater Connector -- MCIL3F & MCBH3M | IP68 | 7000m Depth | SubConn Compatible
Shanghai Kabel Intelligence Technology Co., Ltd supplies 3-contact micro circular wet-mateable underwater connectors including MCIL3F (in-line female) and MCBH3M (bulkhead male). The 3-contact Micro Circular format is widely used for single-device power supply with a dedicated signal/status return -- the minimum configuration for independently switchable subsea instruments on ROV umbilical systems.
Rated to 7,000 m depth, IP68, SubConn® MCBH3/MCIL3 compatible.
Available Models -- 3 Contact
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Part Number
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Type
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Gender
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Notes
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MCBH3M
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Bulkhead
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Male (pins)
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Standard
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MCBH3F
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Bulkhead
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Female (sockets)
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Standard
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MCIL3M
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In-Line
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Male (pins)
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Standard
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MCIL3F
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In-Line
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Female (sockets)
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Standard
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MCBHRA3M
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Right-Angle Bulkhead
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Male (pins)
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90-degree body
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MCDC3F
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Dummy Cap
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--
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Protects MCBH3M
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Technical Specifications
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Contact count: 3
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Depth rating: 7,000 m
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IP rating: IP68
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Voltage: 600 V AC/DC
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Current per contact: 10 A
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Shell: Hard-anodized aluminium / Titanium / Stainless steel option
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Insulator: PEEK
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Contacts: Gold-plated copper alloy
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Sealing: Dual O-ring per contact + face seal
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Hydrostatic test: 600 psig, certificate included
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Compatibility: SubConn MCBH3 / MCIL3
Typical 3-Pin Wiring Allocations
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Single-phase AC motor: L1, L2/N, Earth/Ground
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DC device with status: 24 V+, 0 V return, status signal
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RS-485 sensor: 24 V power, RS-485 A, RS-485 B (power from host)
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Leak sensor: Excitation +, signal out, common ground
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Simple on/off device: Switched 24 V, return, fault monitor
Applications
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Subsea lighting fixtures (power + dimmer + fault)
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ROV gripper and manipulator tool actuators
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Single-axis thruster power + direction control
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Underwater oxygen or pH sensors
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Offshore platform subsea valve actuator connectors
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Marine buoy instrument power connectors
For quotation and technical support:
Email: sales@rovcable.com
Website: www.rovconnector.com | www.rovcable.com
Address: No.100 Yezhuang Road, Fengxian District, Shanghai, China 201415
Frequently Asked Questions
Does MCIL3F mate with SubConn MCBH3M?
Yes. Shanghai Kabel MCIL3F is manufactured to SubConn-compatible face geometry -- direct field mating with OEM SubConn MCBH3M.
Can a 3-pin connector carry 3-phase AC power underwater?
Yes. Each contact is rated at 600 V AC / 10 A. A 3-pin MCBH/MCIL pair can carry a 3-phase AC motor supply at up to 600 V line-to-line. Ensure proper phase separation and insulation resistance testing before deployment.
Is the dummy cap important?
Yes. MCDC3F protects the MCBH3M bulkhead from seawater ingress, biofouling, and physical damage when no in-line connector is mated. Always cap unmated bulkheads between dives.
Applications
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ROV and AUV underwater vehicle systems requiring compact, reliable connectivity
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Subsea sensor instrumentation, oceanographic data acquisition platforms
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Underwater camera, video and LED lighting systems at varying depths
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Ocean bottom seismic systems and marine renewable energy installations
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Naval systems, diving equipment and offshore infrastructure monitoring
Customization Options
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Custom cable harness lengths, wire terminations and direct moulding services
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Alternative connector body materials: anodized aluminum, SS316, or titanium
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Certified hydrostatic pressure testing to customer-specified ocean depths
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Custom bulkhead thread lengths, O-ring configurations and locking sleeve options
