Subsea Wet-Mate 4-Pin Micro Circular Connector | SubConn & Seacon Compatible | IP69 Waterproof

YingDiGe Subsea Micro Circular Connectors are high-reliability, wet-mateable underwater electrical connectors engineered as a direct 1:1 drop-in replacement for the SubConn® Micro Circular series (and compatible with Seacon MCBH/MCIL series). Designed with identical mating profiles, mounting dimensions, and electrical characteristics, they integrate seamlessly into existing underwater systems without requiring mechanical redesign or structural modification.

Highlights at a Glance

• Drop-In SubConn Replacement: Mates directly with existing SubConn-standard systems without equipment redesign. One order covers the complete 4-pin micro link across bulkhead and cable variants (MCIL4F+MCIL4M, MCIL4F+MCBH4M, MCBH4F+MCIL4M, and individual components).
• Complete 4-Pin Micro Link in One Order: Male and female receptacles, male and female cable connectors all available—ideal for panel, bulkhead, and in-line connections with uniform, dependable specifications.
• Heavy-Duty Stainless Steel Shell: High-grade 316 stainless steel shells withstand extreme deep-sea deployments where rubber and plastics degrade; hard gold-plated brass contacts provide exceptional corrosion resistance. IP69K rated and depth-proven up to 7,000 meters (800 bar).
• Deep Marine & Offshore Duty: Rated at 10 A at 300 V with >200 MΩ insulation resistance, engineered for over 500 wet mating cycles in high-pressure marine environments.
• Matched Pairs, Ready to Wire: Supplied as matched male/female pairs or individual units, pre-wired with high-temperature PTFE leads or flexible synthetic rubber cables, ready for immediate installation.

Applications

• Remotely Operated Vehicles (ROV) and Autonomous Underwater Vehicles (AUV / ROTV)
• Offshore oil & gas exploration, subsea production, and renewable marine energy
• Oceanographic observation systems, seabed sensors, and sonar equipment
• Underwater cameras, video systems, and subsea lighting
• Seafloor seismic monitoring arrays and geotechnical instrumentation
• Commercial and defense diving systems and submarine apparatus

Technical Specifications (4-Pin Series)

Parameter	Specification
Configuration	4 Contacts / 4 Pins (MCBH4M / MCIL4F / MCBH4F / MCIL4M)
Rated Voltage	300 V AC/DC RMS
Rated Current	10 A per contact (Max 20 A total) • Pin Diameter 2.8 mm
Insulation Resistance	> 200 MΩ (at 500 V DC)
Contact Resistance	< 0.01 Ω
Wet Mating Cycles	> 500 cycles (wet-mateable submerged)
Operating Temperature (Water)	-4°C to 60°C (25°F to 140°F)
Operating Temperature (Air)	-40°C to 60°C (-40°F to 140°F)
Standard Pressure Rating	800 bar / 11,600 psi (approx. 7,000 ~ 8,000 m water depth)
PEEK Version Pressure Rating	300 bar / 4,350 psi (approx. 3,000 m water depth)
Ingress Protection	IP69 / IP69K (Submerged high-pressure waterproof)
Mounting Thread	7/16-20 UNF-2A

Material Construction

Component	Material
Connector Body	Special Chloroprene Rubber / Polyether TPU
Bulkhead Shell	AISI 316L Stainless Steel (Standard) / Marine Brass / Titanium / PEEK
Contacts	Hard Gold-Plated Copper Alloy (Pin Dia. 2.8 mm)
Locating Pin & Snap Ring	Stainless Steel AISI 316
O-Ring Seal	Nitrile Rubber (NBR) / Fluorocarbon (FKM)
Locking Sleeve	Polyoxymethylene (POM) / Titanium / Stainless Steel

Cable & Conductor Specifications

• 4-Pin In-Line Cable (Standard 3.3 ft / 1.02 m): 18 AWG (1.00 mm²) flexible waterproof synthetic rubber jacket (Nominal OD: 0.334\" / 8.5 mm ±0.5 mm).
• 4-Pin Bulkhead Leads (Standard 1.0 ft / 30 cm): 18 AWG (1.00 mm²) white PTFE insulated wire.

Face View (Male Receptacle / Plug): Standard 4-Pin Contact Arrangement

4-Conductor Cable Color Code

1: Red   2: Black   3: Yellow   4: Blue

Customization & Support

• Custom cable lengths and direct polyurethane (PUR) overmolding
• Custom shell materials (Titanium, PEEK, Brass, 316L SS) and specialized mounting threads
• Certified hydrostatic pressure testing report tailored to target ocean depths
• Factory-direct pricing and fast lead times for OEM/ODM projects