Aluminum Bus Bar

When aluminum makes sense

Aluminum’s conductivity is lower than copper, so you typically need a larger cross-section for the same continuous current. In return you get lower mass and often lower material cost—valuable in large LV switchboards, long horizontal runs, and weight-sensitive cabinets.

Common electrical aluminum choices include 1060-class for high conductivity and 6101-class where strength and conductivity are balanced. Surface treatment matters: bare aluminum forms oxide quickly, so contact faces need preparation, and anodizing is usually for non-contact protection rather than bolted joints.

Partsproto quotes aluminum bus bars with the same drawing-driven process as copper: DFM, machining or punching, forming, finish, and export packing for overseas buyers.

Aluminum also machines faster than copper in many shops, which can shorten lead time on large outlines. The tradeoff is joint discipline: oxide must be managed at every bolted interface or contact resistance creeps up over time.

Fabrication notes for aluminum

Aluminum machines and punches easily but scratches and galls if tooling is neglected. We deburr edges carefully so they do not cut insulation or create hot spots under clamps. Bend radii should respect temper; we call out cracks risk on aggressive bends.

Bolted joints to copper hardware or copper bars need compatible plating or joint compound practice to manage galvanic corrosion. Tell us about mixed-metal interfaces on the RFQ so finish recommendations stay honest.

Inspection focuses on thickness, hole positions, flatness where clamps seat, and finish appearance. Share ampacity assumptions if you want a sanity check on section size before we cut.

Wide thin aluminum bars can oil-can if poorly supported in machining; we use appropriate fixturing and may recommend ribs or thicker stock when flatness at clamp zones is critical.

Ordering tips

Provide drawings with material grade if known, finish, and whether contact faces stay bare. If converting a copper design to aluminum, expect width or thickness to increase—do not copy copper dimensions blindly.

For outdoor or humid environments, discuss coatings and joint protection early. Anodize helps cosmetics and general corrosion resistance but is not a substitute for proper joint preparation on current-carrying faces.

Request pricing at /contact with quantity and ship-to country so freight and packing are included in planning.

Painted finishes need a clear mask map for joint pads. If the entire bar is painted except windows at holes, show those windows on the drawing with dimensions.

Aluminum bus bars for export panel programs

Panel builders exporting finished gear often prefer aluminum on long horizontal runs to keep crate weight down. The electrical designer must still sign off on temperature rise with the larger section—weight savings never override thermal limits.

Hardware selection is part of the aluminum story. Stainless bolts without proper joint practice can worsen galvanic issues; plated hardware and compound help. We fabricate the bar; you own the joint BOM, but we will warn when drawings show risky mixed-metal stacks.

Surface cosmetics on anodized bars vary with alloy and racking marks. If appearance is contractual for visible gear, call that out as a CTQ so we plan finishing and packing accordingly.

Send aluminum grade preference, finish, and section proposal via /contact—or ask us to propose a section from your ampacity notes.

Partsproto’s aluminum bus bar service is aimed at buyers who need exportable, drawing-driven parts—not commodity mill lengths. If your project is still choosing between copper and aluminum, send both ampacity and envelope limits and we will comment on which path looks more practical before you freeze the enclosure.