MCDC4M is a miniature 4-pin male underwater dummy plug from
HYSF SUBSEA, designed to protect an unused compatible subsea connector interface. It provides a protective closure when the operating connection is disconnected, helping limit exposure of the mating area to seawater and debris. This compact accessory is intended for marine equipment requiring connector protection during storage, handling, maintenance, or an approved underwater deployment.Made with a neoprene body, MCDC4M belongs to the HYSF SUBSEA Miniature Circular Series. Its published specifications list a pressure rating of 60 MPa and a working depth of 6000 m. These values should be reviewed for the complete, correctly assembled mating configuration and the intended operating conditions. Identifying the connector being protected is therefore an essential part of selecting the appropriate dummy plug.
MCDC4M Underwater Dummy Plug Features
- Miniature male dummy plug with a 4-pin interface configuration
- Neoprene body for marine connector protection
- Protective closure for an unused compatible connection point
- Compact format for subsea equipment and connector accessory inventories
- Published pressure and depth specifications available for application review
Spécifications techniques
| Model | MCDC4M |
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| Brand | HYSF SUBSEA |
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| Product Type | Underwater protective dummy plug |
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| Série | Miniature Circular Series |
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| Plug Gender | Male |
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| Interface Configuration | 4-pin |
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| Matériau du corps | Neoprene |
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| Published Pressure Rating | 60 MPa |
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| Published Working Depth | 6000 m |
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| Primary Purpose | Protection of an unused compatible connector interface |
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Applications for Subsea Connector Protection
When planning an ROV, underwater instrument, or marine equipment assembly, identify connection points that may remain unused during a particular operation. A suitable protective plug can then be specified alongside the working connectors. This approach helps teams prepare the correct accessories before equipment is packed, serviced, or deployed.MCDC4M can be considered for these protection requirements where its interface matches the installed connector. The selection should account for whether the equipment will be stored onshore, handled on deck, or submerged with the plug fitted. Each use should be described when the assembly is reviewed.For equipment with several similar connectors, record the protected port location alongside the plug model in the service documentation. This makes the selection easier to check when modules are removed or exchanged. Consider the protection requirements at each stage of the equipment workflow, including assembly, shipment, maintenance, and the planned deployment.
Confirming the Correct Connector Interface
Start with the exact model of the connector requiring protection. Supply its drawing or identification details when possible, particularly when replacing an existing dummy plug or specifying accessories for previously assembled equipment. A four-pin description alone does not establish that two components will fit together correctly.Confirm the interface geometry, mating arrangement, and any required retention components with HYSF SUBSEA. For underwater service, include the planned pressure or depth and relevant operating conditions. This information supports selection of a protective plug configuration appropriate to the complete connection assembly.If the installed connector is supplied by another manufacturer, submit its technical information for review. Similar naming, appearance, or contact count should not be used as the sole basis for a compatibility claim. Confirm the proposed combination before specifying it as a replacement or adding it to a procurement list.
Produits apparentés
Two related products in the HYSF SUBSEA miniature four-pin range are:
- MCDC4F: A miniature 4-pin female underwater dummy plug for connector protection applications requiring that plug configuration.
- MCIL4M: A miniature 4-pin male inline underwater cable connector used in working cable assemblies.
These models provide useful references when planning protection accessories and operating connections within the same equipment system. Their inclusion here does not establish a mating combination; select each item against the actual interface requirements.
Ordering Information
To request an MCDC4M quotation, provide the model of the connector to be protected, the required quantity, and the intended use. State the operating depth or pressure for submerged applications and include available interface drawings. If replacing an existing part, provide its identification and explain the installation arrangement.List any project requirements concerning retention, identification, inspection, or documentation for review. Confirm the supplied configuration and applicable specifications before incorporating the dummy plug into the equipment bill of materials.
Handling and Inspection
Follow the manufacturer’s instructions for cleaning, inspection, fitting, and removal. Check the plug and mating interface before use, and refer visible damage or uncertain fit for technical review. Keep the plug identification associated with the equipment it serves so maintenance personnel can select the intended accessory.
MCDC4M FAQ
What is the main function of MCDC4M?
Its main function is to provide a protective closure for an unused compatible underwater connector interface.
Does the four-pin designation confirm compatibility?
No. Confirm the connector model, interface geometry, and complete mating arrangement before selecting the plug.
What should I specify for underwater use?
Provide the mating connector details, intended depth or pressure, and operating conditions so the complete protective connection can be reviewed.
