MCDC3F 3-pin wet-mate dummy connector by RV POWER. Female underwater dummy plug seals unused ROV/AUV bulkhead ports at depth. Wet-mateable, IP68, individual O-ring seals per contact, high-grade brass shell. Ideal for subsea junction boxes, oceanographic moorings, and offshore energy. CCS/CE certified. Bulk pricing available.
The MCDC3F is a 3-pin female wet-mate dummy connector — commonly known as an underwater dummy plug — from RV POWER's Micro Circular Series. Designed to seal and protect unused electrical bulkhead ports on ROVs, AUVs, subsea junction boxes, and marine equipment, the MCDC3F prevents water ingress at de-energized connection points without requiring dry-mate conditions. The wet-mateable design allows insertion and removal underwater at depth.
Every subsea electrical system accumulates unused bulkhead ports during system integration — sensor cables are disconnected for transport, tool circuits are decommissioned between missions, and vehicle configurations change. Without protection, these open bulkhead ports become critical failure points: seawater intrusion causes short circuits, corrosion of contact pins, and catastrophic failure of the entire electrical system.
Wet-mate dummy plugs like the MCDC3F solve this problem by sealing unused ports with a matching dummy connector that mates in the water. The MCDC3F female dummy plug receives the corresponding male bulkhead pin array and uses the same O-ring face seal as the active connector, maintaining the full IP68 depth rating at the unused port.
Key advantages over leaving ports open or using tape/caps:
| Parameter | Specification | Notes |
|---|---|---|
| Model | MCDC3F | Micro Circular Dummy Connector, 3-Pin, Female |
| Connector Type | Wet-mate dummy plug | Seals unused bulkhead ports underwater |
| Pin Count | 3 pins (dummy) | Female receptacle — receives male bulkhead pins |
| Body Material | High-grade brass / metal shell | Corrosion-resistant, marine-grade |
| Sealing | Individual molded O-ring seals per contact | Enhanced waterproof capability |
| Wet-Mate Capability | Yes — mates underwater at depth | No need to drain enclosures |
| Depth Rating | High ocean depth (consult RV POWER) | Per application requirements |
| Waterproof Rating | IP68 (submersible) | Sealed with O-ring face |
| Contact Material | Gold-plated contacts | Corrosion-resistant plating |
| Reusability | Multiple wet-mate cycles | No wear degradation on O-ring face |
| Mounting | Bulkhead mount | Mates with standard MC/MCBH male panels |
| Certifications | CE, RoHS, REACH | Optional CCS certification |
| Feature | Wet-Mate (MCDC3F) | Dry-Mate | Open Port (No Plug) |
|---|---|---|---|
| Mating Environment | Underwater at depth | On deck / in air | N/A |
| Seawater Exposure | Contacts meet underwater | No seawater contact | Always exposed |
| Depth Application | Full ocean depth | Surface or shallow | N/A |
| Installation Time | Fast, no drain needed | Requires dry space | N/A |
| Reusability | Multiple cycles | Multiple cycles | Single use |
| Water Ingress Risk | Zero (with O-ring seal) | Zero | High |
The MCDC3F is part of RV POWER's Micro Circular Dummy Connector family — wet-mateable protective plugs available in 2, 3, 4, 6, 8, and 12-pin configurations. All dummy connectors in this series feature:
RV POWER supplies MCDC3F wet-mate dummy connectors and complete connector kits to ROV operators, oceanographic institutions, AUV integrators, and offshore energy companies worldwide. We offer volume pricing for orders of 20+ units and provide free samples for engineering evaluation.
Contact our sales team:
Email: sales@rvpowergroup.com
Tel: +86 185 0164 8956
Website: www.rvpowergroup.com
RV POWER GROUP LIMITED — Your Trusted Partner in Subsea Connectivity Solutions.
