Blackburn OAPA-300 AL TP SOLID OFFSET PIN TERM 300 BRN

The OAPA-300 is sized for 300 kcmil conductor, which is what the 300 in the catalog number refers to. It is an aluminum-body offset pin terminal, so it accepts either aluminum or copper conductor of that size. The brown color coding is the industry marker for the 300 kcmil range, which is how you spot the right one in a bin of mixed lugs.

The body is aluminum, and Blackburn's dual-rated compression connectors of this type are marked AL/CU for use on either aluminum or copper conductor. Follow the marking on the part itself, and use the compression die the marking calls out. Voltage rating is 600 V, so it suits standard building power feeders and panel terminations.

It carries UL file E63167 and is rated 600 V, which covers normal commercial and industrial branch and feeder work. For an inspector or an institutional spec file, that UL file number plus the 600 V rating is what you cite.

A pin terminal converts a large stranded conductor into a solid round pin so it can land in a set-screw or pressure-plate terminal that was never built to take 300 kcmil stranded, which is the usual problem on breaker and panelboard lugs. The offset geometry shifts the pin off the conductor axis, so you get clearance in tight gutters and can line up on terminals that sit out of line with the cable run. If your equipment terminal already accepts the full conductor, a plain compression lug or a mechanical set-screw lug is the simpler choice.

It is a solid-barrel compression connector. The conductor goes into the barrel and you crimp it with a hydraulic or battery compression tool using the die the connector is marked for. There are no set screws and no bolts, so plan on having the right die on the truck before you cut the cable in.

Country of origin is the United States, which is what government, education, and other publicly funded jobs with domestic sourcing requirements need on the submittal. Manufacturer part number for that paperwork is OAPA-300 under the Blackburn brand.

The OAPA-300 covers the 300 kcmil position only. Blackburn's OAPA offset pin series runs across a range of conductor sizes, each with its own catalog number and its own color code, so match a separate part number to each conductor size on the panel rather than trying to stretch one size across two. Color is your quick field check: brown is the 300 size in this family.

Sold each, one terminal per unit, so order one per conductor you are landing. On a three phase feeder with a neutral that is four pieces, and most crews add a spare since a mis-crimped barrel cannot be reused.