Blue Sea Systems 2312 Common BusBar, 150 Amp, 20-Position 8-32 Screw Terminal with Cover

The Blue Sea Systems 2312 is a 150 ampere common busbar built for consolidating multiple positive or negative connections onto a single, low-resistance point in a 12V or 24V DC marine electrical system. It is designed with a stud-based terminal that provides direct terminal-to-bus contact for a low-resistance connection, and the bus itself is tin-plated copper (CDA 110/UNS11000) for maximum conductivity and corrosion resistance. The base is molded from glass-reinforced polycarbonate rated UL 94-VO (self-extinguishing) to resist high heat, and the busbar ships with a press-on polycarbonate insulating cover that snaps onto the studs while leaving the wire terminals unobstructed for easy access. The raised bus design lets multiple wires land on a single screw terminal, simplifying circuits that need to share a common connection point.

Electrically, the 2312 carries a continuous rating of 130 amperes AC and 150 amperes DC, with a maximum voltage rating of 300 volts AC and 48 volts DC. It has 20 positions total: stainless steel 1/4"-20 studs (torqued to 72 in-lbs, accepting a 1/4" or M6 ring terminal) along with stainless steel #8-32 screw terminals (torqued to 18 in-lbs, accepting a #8 or M4 ring terminal). This combination of stud and screw terminals allows both heavy main-circuit cables and smaller branch-circuit wires to be terminated on the same busbar.

Specifications

• Brand: Blue Sea Systems
• Manufacturer Part Number: 2312
• Continuous Amperage (AC): 130 Amperes
• Continuous Amperage (DC): 150 Amperes
• Maximum Voltage Rating (AC): 300 Volts
• Maximum Voltage Rating (DC): 48 Volts
• Number of Positions: 20
• Bus Material: Tin-Plated Copper CDA 110/UNS11000
• Base Material: Glass Reinforced Polycarbonate, UL 94-VO Rated
• Cover Material: Polycarbonate
• Stud Terminals: Stainless Steel, 1/4"-20, torque 72 in-lbs, accepts 1/4" (M6) ring terminal
• Screw Terminals: Stainless Steel, #8-32, torque 18 in-lbs, accepts #8 (M4) ring terminal
• Mounting Type: Panel Mount
• Weight: 0.57 pounds
• UPC: 632085023126

Frequently Asked Questions

What is the amperage rating of the Blue Sea Systems 2312 busbar? The 2312 is rated for 130 amperes continuous AC and 150 amperes continuous DC, with a maximum voltage rating of 300 volts AC and 48 volts DC.

Does the 2312 come with a cover? Yes, the Blue Sea Systems 2312 includes a press-on polycarbonate insulating cover that attaches over the studs while still allowing unobstructed access to the wire terminals.

How many terminal positions does this busbar have? It has 20 positions total, combining stainless steel 1/4"-20 studs with stainless steel #8-32 screw terminals on the same bus.

What size ring terminals fit the stud connections on the 2312? The 1/4"-20 stainless steel studs accept a 1/4 inch (M6) ring terminal and should be torqued to 72 in-lbs.

What size ring terminals fit the screw terminals on the 2312? The #8-32 stainless steel screw terminals accept a #8 (M4) ring terminal and should be torqued to 18 in-lbs.

What material is the bus made from on the 2312? The bus is tin-plated copper (CDA 110/UNS11000), chosen for high conductivity and resistance to corrosion.

Is the base material heat resistant? Yes, the base of the Blue Sea Systems 2312 is glass reinforced polycarbonate rated UL 94-VO, meaning it is self-extinguishing and resists high heat.

How much does the 2312 busbar weigh? The Blue Sea Systems 2312 weighs 0.57 pounds.

Can the 2312 be used for both positive and negative common connections? The 2312 is a common busbar designed to consolidate multiple wires onto a single low-resistance point, and can be used as either a positive or negative distribution point in a DC electrical system.

What is the difference between the 2312 and the version without a cover? The 2312 ships with a press-on insulating cover; a version of the same busbar without the cover is sold under a different part number.

Why does the 2312 have both stud and screw terminals instead of just one type? The stud terminals (1/4"-20) handle heavier main-circuit cables while the smaller #8-32 screw terminals handle lighter branch-circuit wires, letting both be landed on the same busbar.