Pure Copper 110 Flat Bar — Rectangular Copper Busbar Bar

Pure copper 110 flat bar — also called rectangular copper bar, copper flat stock, copper busbar bar, or solid copper bus bar — is a straight, solid copper bar whose cross-section is rectangular: wider than it is thick, drawn from 99.9% pure copper 110. The broad, flat faces create large contact areas for bolted and clamped connections, which is why flat bar is the default conductor for busbars, grounding straps, shunts, switchgear links, and transformer and panel connections. It is also widely used for brackets, edging, decorative trim, and fabricated copper parts that need a flat, straight, stable section.

Flat bar is ordered by thickness (T) × width (W), with both dimensions shown in millimeters and inch equivalents. Each thickness is offered in multiple widths, and pure copper 110 flat bar is supplied in standard straight lengths or cut to the exact length your assembly requires across the United States.

What Is Pure Copper 110 Flat Bar?

Pure copper 110 is commercial-grade 99.9% pure copper valued for high electrical and thermal conductivity, natural corrosion resistance, and easy machining, drilling, bending, and joining. In flat bar form it is a wrought solid product with a constant rectangular section. The defining feature is geometry: thickness is a smaller fraction of width than a square bar, but the section remains a solid bar rather than a thin, flexible strip. The two wide faces give clean, flat contact surfaces for joints and busbars, and the section is rigid enough to stand and mount without support. US buyers search this stock as “copper flat bar,” “rectangular copper bar,” “copper busbar bar,” “flat copper bus bar,” and “solid copper flat stock.”

Thicknesses and Widths (T × W)

Flat bar is selected by choosing a thickness and a matching width from the product variants. The standard thickness range is shown below; each thickness is available in multiple widths, and live variants reflect the T × W combinations actually stocked.

Each thickness is supplied in several widths; select the exact T × W combination from the variant list. Equal-edge sections (thickness = width) are supplied as square bar, round sections as round bar, and wide thin flat-rolled material as sheet or plate in the copper bar and rod collection.

Key Properties of Pure Copper 110 Flat Bar

Why Flat Bar Is the Standard Busbar Shape

• Large contact area — flat faces give low-resistance bolted joints at terminals, breakers, and transformer connections.
• Easy drilling and tapping — wide faces take bolt holes and mounting holes directly for panels and grounding systems.
• Better cooling than solid rounds — the wider exposed surface of rectangular busbar dissipates heat efficiently in panels.
• Neat parallel runs — flat busbars stack and align in switchgear, control cabinets, and distribution boards.
• Flexible layout — choose thickness for current rating and width for the available space and connection layout.
• Cut to length — receive ready-to-install busbar and strap sections with no on-site cutting waste.

How to Order Rectangular Copper Bar

Common Applications

Industries That Use Copper Flat Bar

• Power distribution & switchgear — busbars, risers, neutral and ground bars in panels and substations.
• Renewable energy & batteries — battery links, inverter connections, and solar and storage conductors.
• Welding & resistance equipment — secondary circuits, holder arms, electrode and fixture bars.
• Plating & surface treatment — anode and cathode bars, rail conductors, and process line hardware.
• Electrical contracting & earthing — grounding and bonding straps, equipotential bars, and site connections.
• Architecture, furniture & craft — trim, inlays, edging, brackets, and decorative rectangular copper details.

Working & Fabrication Notes

Pure copper 110 flat bar saws and shears cleanly, drills and punches for bolted connections, and bends flatwise or edgewise with suitable tooling. It solders, brazes, and welds readily for permanent joints, and its wide flat faces polish brightly for decorative trim or remain bare for industrial use. Flat copper busbar needs no plating in many indoor and atmospheric environments; exposed pieces develop a stable patina over time. For bends, the flat section forms more easily across the wide face than edgewise, which is standard practice when running busbars around panel corners.

Flat Bar vs Square Bar, Round Bar, and Plate

• Flat bar is a solid rectangular section wider than it is thick, chosen for busbars, straps, and flat connectors.
• Square bar has equal edges (thickness = width) and is chosen for square conductors, posts, and trim.
• Round bar is a circular section for shafts, pins, and general turned or machined parts.
• Sheet and plate are wide flat-rolled panels; flat bar is a narrow, narrow-edged solid bar supplied in straight lengths.

Custom Cut Lengths

Pure copper 110 flat bar is supplied in standard straight lengths or cut to the specified length in millimeters or inches. Repeated busbar sections, ground straps, connector blanks, and trim pieces can be cut from the same T × W section so they arrive ready for drilling, bending, or installation. Non-standard T × W combinations or parts requiring additional processing are handled as custom orders, with handling time extended according to the difficulty and complexity of the work.

Shipping & Delivery

Pure Copper 110 Flat Bar FAQ