LOW-VOLTAGE DC POWER DISTRIBUTION

12V–48V DC Busbars & Power Distribution Blocks

DC busbars and power distribution blocks for automotive, marine, RV and auxiliary battery systems. Single and dual layouts are available for 12V–48V DC applications, with high-current models up to 600A.

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SYSTEM VOLTAGE 12V–48V DC · Verify by model
CURRENT CAPACITY Up to 600A · Rating varies
TERMINAL LAYOUTS Stud, screw, single and dual
COVERS AND INSULATION Insulated bases and clear covers

DC Busbar and Power Distribution Block Models

BB275-T2M8S14-C 275A Terminal Busbar Block with 2×M8 Studs and 14×M4 Screws

Ensure reliable power distribution with this 275A terminal busbar block. Features 2×M8 studs, 14×M4 screws, robust construction, and a protective cover for safe, multi-angle installations.

BB275-T2M10S10-C 275A Distribution Connecting Block with 2×M10 Studs and 10×M4 Screws

Ensure reliable power distribution with this 275A terminal busbar block. Features 2×M8 studs, 14×M4 screws, robust construction, and a protective cover for safe, multi-angle installations.

BB275-T5M10-C 275A 48VDC M10(3/8″) 5 Stud Bus Bar with Protect Cover

The 48VDC 250A 5 stud bus bar features M10 stainless steel terminal studs, a protective cover, and flexible installation options.

BB275-T6M8-C 275A 48VDC 6×M8 Studs Bus Bar Battery Power Distribution Block

The M8 studs bus bar is rated at 275A (12-48V DC) and is fitted with 6 × M8 terminal studs to provide a wide range of connection options for different types of cables and connectors.

BB300-T3M10S10-C 48V DC 300A 3×M10 Studs and 10×M4 Screws Marine Bus Bar

The M10 stud marine bus bar is rated for 300A in 48V DC/300V AC, 3×M10 terminal studs, and 10×M4 terminal screw.

BB300-T6M8/M10-C 300A 6×M8/M10 Terminal Studs Power Distribution Block 12V

The copper power distribution block 12V is rated for 300A in 48V DC / 300V AC with 6×M8 or M10 terminal studs.

BB300-T4M8/M10-C-BOX1 300A 12V Distribution Block Bus Bar Box with 4×M10/M8 Studs

The red and black 12V distribution block busbar box is rated for 300A in 48V DC / 300V AC and comes with 4×M10 or M8 size terminal studs.

BB400X2-T2M8 400A Dual Row Bus Bar Box Distribution Block with 4×5/16”(M8) Studs

This 400A dual row bus bar box features a 6mm thick nickel-plated copper construction with four 5/16" (M8) studs, ensuring reliable high-current power distribution in demanding applications.

BB400-T3M10S8-C-2 12-48VDC 400A Power Distribution Block with 3xM10 Studs & 8xM5 Screws

This 400A power distribution block features three M10 studs and eight M5 screw terminals for versatile wiring, a durable 8mm copper bus bar plate, and a protective cover for safety.

BB400-T3M8S10-C-2 400A Bus Bar Power Distribution Block with 3xM8 Studs & 10x#8 Screws

This 400A busbar features 3×M8 stud terminals and 10×#8 screw terminals for versatile high-current applications in demanding environments.

BB400-T4M8/M10S3-C-2 400A Bus Bar Terminal Block with 4×3/8″(M10) or 5/16″(M8) Studs

This 400A bus bar terminal block features 4×M8/M10 studs and 3×M4 screws for versatile high-current applications in demanding environments.

BB400-T4M8/M10S6-C 400A Busbar Distribution Block w/ 4×5/16″ or 3/8″ Studs and 6x#8 Screws

This 400A busbar distribution block features 4x M8/M10 studs, 6x #8 screw terminals, and an 8mm copper plate for robust power distribution.

BB400-T6M8-C 400 Amp Solid Copper Busbar with 6×5/16″ (M8) Stud Terminals

This 400A busbar distribution block features 4x M8/M10 studs, 6x #8 screw terminals, and an 8mm copper plate for robust power distribution.

BB500-T6M8X4M10X2 Heavy Duty 48VDC 500A Busbar Box with 4×M8 and 2×M10 Studs

The 48VDC 500A busbar has 6 terminal studs, including 4*M8 terminal studs and 2*M10 terminal studs. The thickness of the pure copper plate is 6mm.

BB600-T6M10-C 600A 48VDC 6 x M10 (3/8″) Stud Power Bus Bar Distribution Block

The 48VDC 600A power bus bar has 6 × M10 (3/8") terminal studs and the power bus thickness of the pure copper plate is 20mm.

BCP-1 250A 3/8″ Studs Remote Battery Charger Post with Caps

The remote battery charger post is a 12V 250A 3/8" stud remote battery terminal with a waterproof cover for marine, cars, trucks, ATVs, UTVs, etc.

BCP-2 250A 3/8″ Stud Thru Panel Cable Battery Terminal Connector with Cover

The thru panel cable battery terminal connector with cover features a 3/8" stud, offers enhanced battery connectivity with a substantial 250A rated current.

L3.3 Series 12-10 AWG Small L-Shape Silicone Terminal Covers Fits M6 & M8 Studs

The L3.3 Series silicone terminal cover fits wire diameters up to 3.3mm (12 AWG – 10 AWG) and accommodates M6 (1/4") to M8 (5/16") studs.

L7.5 Series 8 AWG – 4 AWG Silicone Battery Terminal Covers Fits M8 & M10 Studs

The L7.5 Series battery terminal cover fits wire diameters up to 7.5mm (8 AWG – 4 AWG) and accommodates M8 (5/16") to M10 (3/8") studs.

L13 Series 2 AWG – 2/0 AWG Silicone Terminal Boots Fits M10 & M12 Studs

The L13 Series fits large wire diameters up to 13mm (approx. 2 AWG – 2/0 AWG) and accommodates large battery lugs and M10 (3/8") to M12 (1/2") studs.

ENGINEERING OVERVIEW

Low-Voltage DC Power Distribution for Mobile Equipment

Busbars in this category are compact connection components for auxiliary DC circuits. The main differences are the number and arrangement of terminals, whether positive and negative connections share one assembly, and how the terminals are protected.

Busbar and Distribution Block Configurations

Common busbars bring several conductors together on one positive or negative connection point. Available models use different combinations of studs and screws.
Dual busbars place separate positive and negative rows in one insulated unit, making the two connection paths easier to identify.
Power distribution blocks pair larger main studs with smaller branch terminals for multiple accessory circuits.

These layouts are used in vehicle auxiliary systems, marine electrical panels, RV battery circuits, and compact off-grid equipment. Some models have covered terminals or insulated bases where the installation calls for additional contact protection.

The catalog includes 12V, 24V, and 48V DC options, with selected models rated up to 600A. Current rating, terminal dimensions, mounting space, and cover design vary by model. Check the individual product specifications before placing a production order; for an OEM enquiry, a part number or drawing helps identify a suitable layout.

Frequently Asked Questions

What is a DC busbar used for?

A DC busbar creates a common connection point between a battery or DC power source and several circuits. It may be used for positive distribution, negative return distribution, or a paired positive-and-negative arrangement.

How should a busbar be selected?

Selection should begin with continuous current, system voltage, cable size, lug size, terminal quantity, mounting space, and required protection. Terminal count alone does not determine whether a busbar is suitable for the application.

Is a busbar the same as a battery distribution block?

Both products organize multiple electrical connections around a common power source. A battery distribution block often uses a more structured layout with main studs, branch terminals, insulation, or cover options, while a busbar may be a simpler common connection bar.

Are covers and insulated bases necessary?

The requirement depends on the installation. Covered or insulated configurations are useful where cables, tools, loose hardware, or service access could create a risk of accidental contact. Clearance for cable routing and terminal service should also be checked.

What information is needed for an OEM enquiry?

Please provide system voltage, continuous current, cable and lug size, main terminal size, branch quantity, mounting dimensions, cover requirement, drawing, and expected order quantity. These details help determine whether a catalog model or a custom layout is appropriate.

Engineering Consulting & Custom Quotes

Submit drawings or specs for Busbar. Receive engineering feedback and quotes within 24 hours.

Applications