Blue Sea Systems 2303 Common BusBar, 150 Amp, 4 Stud 1/4-20, No Cover

The Blue Sea Systems 2303 is a 150 amp common busbar built to distribute power or ground connections across four separate circuits from a single point. It features 4 terminal studs sized 1/4"-20, giving installers a secure, high-conductivity connection point for battery cable lugs, ring terminals, and other electrical connections in a boat's DC or AC electrical system. The busbar is rated for a max voltage of 300V AC / 48V DC, with a continuous rating of 130A AC / 150A DC, making it suitable for main power distribution, ground bus, or accessory feed applications where multiple circuits need to share a common connection.

Construction pairs a reinforced polycarbonate base with tin-plated pure electrical copper busbar material, delivering strong conductivity while resisting corrosion in the marine environment. The base includes 2 mounting holes that accept #10 (M5) screws for secure panel or bulkhead mounting. This version of the 2303 ships without a cover; buyers who want a protective cover over the exposed studs can use the Blue Sea Systems 2715 cover, which is designed to fit this busbar.

Specifications

• Brand: Blue Sea Systems
• Manufacturer Part Number: 2303
• Amperage Rating: 150 amp DC
• Continuous Rating: 130A AC / 150A DC
• Max Voltage: 300V AC / 48V DC
• Terminal Studs: 4 x 1/4"-20
• Mounting Holes: 2 holes, accept #10 (M5) screws
• Cover Included: No
• Compatible Cover: Blue Sea Systems 2715
• Material: Reinforced polycarbonate base with tin-plated pure electrical copper
• Product Dimensions: 1.5" L x 2" W x 8" H
• Weight: 0.35 pounds
• UPC: 632085023034

Fitment

Universal marine electrical busbar; not vehicle- or engine-specific.

Replaces (OEM)

No OEM cross-reference numbers apply to this part.

Frequently Asked Questions

How many amps is the Blue Sea Systems 2303 busbar rated for? The 2303 is rated for a continuous 150A DC (130A AC), with a max voltage of 300V AC / 48V DC.

Does the 2303 busbar come with a cover? No, part number 2303 ships without a cover. Blue Sea Systems sells the 2715 cover separately, which is designed to fit the 2303.

How many studs does the 2303 have? It has 4 terminal studs, each sized 1/4"-20, allowing up to four circuits to be connected to the same busbar.

What size screws does the 2303 busbar mount with? The busbar has 2 mounting holes that accept #10 (M5) screws for securing it to a panel or bulkhead.

What is the 2303 busbar made of? It uses a reinforced polycarbonate base combined with tin-plated pure electrical copper for the current-carrying busbar, giving strong conductivity and corrosion resistance.

What are the dimensions of the Blue Sea Systems 2303? The 2303 measures 1.5 inches long by 2 inches wide by 8 inches high.

How much does the 2303 busbar weigh? It weighs 0.35 pounds.

Can the 2303 be used for both power and ground distribution? Yes, as a common busbar the 2303 can be used to distribute power or ground connections across its 4 studs, depending on how it is wired into the system.

What is the difference between the 2303 and the 2307 busbar? Both are 4-stud, 1/4"-20 busbars from Blue Sea Systems, but the 2307 comes with a cover while the 2303 does not.

Is there a version of this busbar with a cover already installed? Blue Sea Systems part 2307 is the covered equivalent; the 2303 covered here ships without a cover, and the 2715 cover can be added separately.

What voltage can the 2303 busbar handle? The 2303 is rated for a maximum of 300V AC or 48V DC.

What is included when I order the 2303? You receive one Blue Sea Systems 2303 busbar; no cover or mounting hardware is included with this part.