Marinco 305CRMB Replacement Interior for 303 3-Wire Locking Power Inlets (303SSEL-B, 303SSEL-BRV)

The Marinco 305CRMB is a replacement interior designed for Marinco 303 3-Wire Locking Power Inlets, specifically the 303SSEL-B and 303SSEL-BRV models. Rather than replacing an entire shore power inlet, boat owners and marine electricians can swap out just the internal connector assembly when the interior contacts or components wear out or become damaged from repeated plugging and unplugging or from moisture exposure.

The 305CRMB features a male-to-female connector configuration built for 120 volt shore power systems, rated at 1250 watts, with a 2-conductor, 3-prong locking design that matches the original 303-series inlet housing. The interior is constructed from black plastic material for durability in a marine environment, and it is sized to drop into the existing 303SSEL-B and 303SSEL-BRV inlet housings without needing to replace the outer enclosure.

This part ships as a single replacement interior unit, allowing for a straightforward repair rather than a full inlet replacement, which saves on both parts cost and installation time.

Specifications

• Brand: Marinco
• Manufacturer Part Number: 305CRMB
• Compatible With: 303SSEL-B, 303SSEL-BRV (303 3-Wire Locking Power Inlets)
• Color: Black
• Connector Gender: Male-to-Female
• Voltage: 120 Volts
• Wattage: 1250 watts
• Number of Conductors: 2
• Power Cord Prong Count: 3
• Case Material: Plastic
• Package Dimensions: 6.9 inches L x 5.7 inches W x 2.5 inches H
• Weight: 0.25 pounds

Fitment

• Marinco 303SSEL-B 3-wire locking power inlet
• Marinco 303SSEL-BRV 3-wire locking power inlet

Frequently Asked Questions

What is the Marinco 305CRMB used for? The Marinco 305CRMB is a replacement interior for 303 3-wire locking power inlets, letting you replace the internal connector assembly of the inlet without swapping the entire unit.

Which inlets does the 305CRMB fit? The 305CRMB is designed to fit the Marinco 303SSEL-B and 303SSEL-BRV 3-wire locking power inlets.

What voltage and wattage is the 305CRMB rated for? It is rated for 120 volts and 1250 watts.

How many conductors and prongs does this interior have? The 305CRMB has 2 conductors and a 3-prong locking configuration, matching the original 303-series inlet design.

What color is the 305CRMB? The replacement interior is black.

What material is the 305CRMB made from? It is made from plastic, matching the case material used in the original 303 series power inlet.

What are the dimensions of the 305CRMB package? The packaged part measures 6.9 inches long by 5.7 inches wide by 2.5 inches high.

How much does the 305CRMB weigh? The 305CRMB weighs 0.25 pounds.

Is the connector male or female? The 305CRMB has a male-to-female connector gender configuration.

Do I need to replace the whole inlet housing to install the 305CRMB? No, the 305CRMB is just the interior connector assembly, meant to be installed into an existing 303SSEL-B or 303SSEL-BRV inlet housing rather than replacing the full unit.

Is the 305CRMB an authentic Marinco part? Yes, the 305CRMB is a genuine Marinco part, manufactured by Marinco for use in its 303 series 3-wire locking power inlets.