Hubbell Marine

Hubbell M5100B9R 100A 30Y 120/208V Inlet

SKU: 1000657 · UPC: 783585510019 · MPN: M5100B9R
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02 · Overview

Hubbell M5100B9R 100A 30Y 120/208V Inlet — Product description

Hubbell M5100B9R 100A 3φ 120/208V Shore Power Inlet - Professional Marine Electrical

Connect demanding three-phase marine electrical systems with the Hubbell M5100B9R 100A Shore Power Inlet. Engineered for professional marine applications requiring 120/208V three-phase power, this inlet features Hubbell's industry-leading pin and sleeve technology with automatic spring-loaded cover protection. Ideal for commercial vessels, superyachts, and marine facilities with complex electrical requirements.

Three-Phase Marine Power Connection

  • 100 Amp Three-Phase: Handles demanding electrical loads for commercial marine applications
  • 120/208V Configuration: Standard 4-pole, 5-wire three-phase wye system
  • Automatic Weather Protection: Spring-loaded gasketed cover closes automatically
  • Marine-Grade Construction: Gray nylon housing resists UV and corrosion
  • Professional Mounting: 4.88" centers with 3.94" rear diameter

Technical Specifications

Model Number M5100B9R
Current Rating 100 Amperes
Voltage Rating 3-Phase Wye 120/208V AC
Configuration 4-Pole, 5-Wire Grounding
Mounting Centers 4.88" (123.8mm)
Rear Diameter 3.94" (100.0mm)
Housing Material Gray Nylon
Protection Rating IP67 Watertight

Professional Marine Applications

  • Commercial Vessels: Charter boats, fishing vessels, and working craft
  • Superyacht Systems: Large vessel electrical distribution and propulsion
  • Marina Facilities: Shipyards, service docks, and maintenance areas
  • Industrial Marine: Offshore platforms and specialized marine equipment

Three-Phase Power Benefits

Three-phase power systems provide superior efficiency and performance for heavy marine electrical loads. The M5100B9R's 120/208V configuration delivers balanced power distribution, reduced conductor requirements, and improved motor performance compared to single-phase alternatives. This makes it essential for vessels with air conditioning systems, large pumps, and propulsion equipment.

Hubbell Marine Excellence

As the pioneer in 100-amp marine electrical devices, Hubbell developed the industry standard for pin and sleeve connections in collaboration with the National Electric Code and American Boat and Yacht Council. This inlet represents decades of marine electrical expertise, featuring factory-controlled manufacturing and specially compounded materials designed for continuous 100-amp operation in marine environments.

Marine Safety Compliance

  • UL Listed: Certified for marine three-phase electrical safety
  • ABYC Compliant: Meets American Boat and Yacht Council standards
  • NEC Compatible: Conforms to National Electric Code requirements
  • Corrosion Resistant: Marine-grade materials for saltwater environments

Professional Installation Features

The M5100B9R simplifies three-phase shore power connections with its proven design. The automatic spring-loaded cover ensures consistent watertight protection, while the standardized mounting pattern allows integration with existing marine electrical panels. All mounting hardware and gaskets are included for professional installation.

Frequently Asked Questions

What's the advantage of three-phase shore power?

Three-phase power provides more efficient operation of large motors, air conditioning systems, and heavy electrical equipment while using smaller conductors than equivalent single-phase systems.

Is this compatible with single-phase shore power?

No, the M5100B9R requires three-phase 120/208V shore power infrastructure. It's not compatible with standard single-phase marine shore power systems and requires specialized marina facilities.

What conductor size is required?

The M5100B9R requires heavy-gauge marine electrical cable rated for 100-amp continuous duty. Professional marine electricians should specify appropriate conductor sizes based on installation requirements and local codes.

How does the automatic cover system work?

The spring-loaded gasketed cover automatically closes and seals when the shore power connector is disconnected, providing immediate IP67 watertight protection without manual intervention.

Hubbell Marine was the first to offer 100 amp marine grade devices that are considered second to none.

Hubbell developed the standard for 100 amp Pin and Sleeve devices with the National Electric Code and the American Boat and Yacht Council.

Only Hubbell offers 3, 4 and 5 wire 100 amp cable sets for your shore power requirements.

Cable sets manufactured in factory controlled conditions using specially compounded cable to accommodate a full 100 amp.

100 Amp pin and Rugged, watertight, sleeve devices. UL listed, AB02029 YC compliant, corrosion resistant.

100 Ampere, 125/250 Volt 3 Pole 4 Wire Ship-to-Shore Devices

M4100B12R
Gray nylon shore power inlet has gasketed, spring-loaded cover which closes automatically when not in use and is watertight when securely fastened. Mounting holes are 4.88 in. (123.8) on centers and rear portion has 3.94 in. (100.0) diameter. Mounting screws and gasket included.

M4100C12R
Yellow Zytel® super tough nylon watertight connector body has gasketed locking ring to make inlet/connector interface watertight. Cord grip range is 1.00?1.94 in. (25.4?49.3). Note: This device mates with shore power inlet only.

M4100P12
Yellow Zytel® super tough nylon watertight plug has gasketed locking ring to make plug/receptacle interface watertight. Cord grip range is 1.00?1.94 in. (25.4?49.3).

M4100R12
Gray nylon dockside receptacle has gasketed, spring-loaded cover. Closes automatically when not in use and is watertight when securely fastened. Mounting holes are 4.88 in. (123.8) on centers. Mounting screws and gasket included.

M4100C12
Yellow Zytel® super tough nylon watertight connector body for mating plug to connector interface on extension cords or adapters. Cord grip range
is 1.00?1.94 in. (25.4?49.3). Note: It cannot be mated to the shore power inlet.

100 Ampere, 3 Y 120/208 Volt and 3 Y 277/480 Volt 4 Pole 5 Wire Ship-to-Shore Devices

M5100B9R
Gray nylon shore power inlet has gasketed, spring-loaded cover which closes automatically when not in use and is watertight when securely fastened. Mounting holes are 4.88 in. (123.8) on centers and rear portion has 3.94 in. (100.0) diameter. Mounting screws and gasket included.

M5100C9R
Yellow Zytel® super tough nylon watertight connector body has gasketed locking ring to make inlet/connector interface watertight. Cord grip range is 1.00?1.94 in. (25.4?49.3). Note: This device mates with shore power inlet only.

BB1001W
15° angle cast aluminum back box has corrosion resistant gray finish and top hub with 1 in. N.P.T. 100A receptacles can be mounted directly to it.

BB100N
15° angle non-metallic back box, made of high-grade engineered thermoplastic Valox® to resist chemicals, abuse and U.V. rays. Has integral grounding plate, 1 in. N.P.T. hub size and 120 cu. in. capacity (hub is not included - Raco part number 1706 is recommended).

M5100P9
Yellow Zytel® super tough nylon watertight plug has gasketed locking ring to make plug/receptacle interface watertight. Cord grip range is 1.00?1.94 in. (25.4?49.3).

M5100R9
Gray nylon dockside receptacle has gasketed, spring-loaded cover. Closes automatically when not in use and is watertight when securely fastened. Mounting holes are 4.88 in. (123.8) on centers. Mounting screws and gasket included.

M5100C9
Yellow Zytel® super tough nylon watertight connector body for making plug to connector interface on extension cords or adapters. Cord grip range is 1.00?1.94 in. (25.4?49.3). Note: It cannot be mated to the shore power inlet.



"Hubbell nylon shore power inlet has gasketed, spring-loaded cover which closes automatically when not in use and is watertight when securely fastened. Mounting holes are 4.88\" on centers and rear portion has 3.94\" diameter. Mounting screws and gasket included. . . The terminals are clearly identified with large markings for easy recognition. . The device is marked with its catalog number and rating for easy identification. Nickel plated solid brass pins provide for long life and reliable electrical contact in corrosive environments. Special keying makes proper alignment of mating devices quick and easy. Nylon housing provides increased safety and abuse resistance. IP67 suitability. UL listed, CSA certified."
SKU: NVN-1000657
MPN: M5100B9R
UPC: 783585510019
03 · The numbers

Technical specifications

BrandHubbell Marine
ModelHubbell M5100B9R 100A 30Y 120/208V Inlet
SKU / MFR#1000657

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04 · Before you buy

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05 · Customer voices

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