Marinco Heavy-Duty 63A 3-Phase Shore Power Inlet (4-Wire, Stainless Steel)

The Marinco heavy-duty 63A three-phase inlet is a top-tier solution for bringing three-phase power onboard large vessels and mega yachts. Built from premium AISI 316 stainless steel, it is engineered to withstand the harsh marine environment and provide years of corrosion-free service. The construction is 4-wire: it features three phase pins plus a grounding pin (3P+E configuration), allowing connection to a three-phase supply (typically 3x230V/400V at marinas). With a capacity of 63A per phase, this inlet can deliver over 40 kW of total power, sufficient to meet the demands of even the most energy-intensive systems on board.

Like others in the Heavy-Duty lineup, this inlet carries an IP56 rating, signifying protection against dust and powerful water jets. This is crucial when installed on deck or hull areas exposed to waves or heavy rain. The stainless steel lid has an integral gasket that seals the inlet tightly when no cable is plugged in, preventing water ingress and salt deposits on the contacts. Nickel-plated contacts provide minimal wear in multi-pin connection scenarios and stable performance under load.

Applications and highlights:

• Uncompromising power delivery: The Marinco 63A 3-phase inlet is designed for the most demanding electrical systems. When connected to a three-phase shore source, it can supply an enormous amount of energy to your vessel – necessary for mega yachts running multiple HVAC units, heavy-duty motors or cranes, large desalination plants, professional galley equipment, etc. With this inlet, your vessel can tap into the full potential of marina power without voltage drops or shortages.
• Ideal for mega yachts and industrial vessels: Recommended for vessels roughly over 20 meters (65+ feet) in length, superyachts, small commercial passenger ships or service vessels that utilize three-phase equipment on board. In offshore installations (e.g., oil rigs or large floating platforms), this type of inlet is also used for hooking up to generators or onshore power feeds.
• Part of a complete 3-phase system: This inlet pairs with the Marinco heavy-duty 63A three-phase female plug (product code 14.587.09) – together they form a complete set for a 3-phase shore power connection. Using genuine Marinco components ensures optimal fit, locking, and conductivity. It’s recommended to use a matching 4-conductor shore power cable (3 hots + 1 ground) of adequate gauge (for example, 4 x 16 mm²) to handle the load safely.
• Safety and standards: The inlet meets international electrical safety and marine certification standards. The grounding pin is designed and positioned to connect first and disconnect last when plugging or unplugging – this ensures the vessel is always grounded before any power flows, protecting crew and equipment. Important: When dealing with three-phase shore power, ensure your vessel’s electrical system is configured for it (voltage, phase balancing) and that you have appropriate protections (breakers, RCDs/GFCIs) on board.