Blackburn BTC3511 CU 1CNDTR 1HOLE MOUNT 1/0STR-350

The BTC3511 is built for conductors from 1/0 stranded up to 350 kcmil, which is the range printed in its description. If your feeder is smaller than 1/0 or larger than 350 kcmil, this is the wrong lug and you need a different size in the series.

One hole, one conductor. The BTC3511 is a single-barrel mechanical terminal with a one-hole mounting pad, so it lands a single cable on a bus, panel pad or equipment terminal. For two-bolt NEMA pad spacing you need a two-hole lug instead.

No. This is a copper-bodied, copper-only terminal (the CU in the part description), so it should be landed on copper conductors only. For aluminum or mixed AL/CU service you need a dual-rated AL9CU connector.

It carries UL file E9809, so an electrical inspector has a listing to reference on a mechanical copper terminal installation. Install it to the conductor range and torque marked on the connector to keep that listing valid.

No crimp tooling. It's a mechanical set-screw type terminal, so you strip the conductor, insert it in the barrel and tighten the screw with a hex key or torque driver. That makes it the practical choice for field terminations and service work where nobody wants to haul a hydraulic crimper and a die set.

Both land the same conductor; the difference is installation and inspection. The BTC3511 is a mechanical copper terminal covering 1/0 stranded through 350 kcmil, so one part number covers several conductor sizes on a job and it can be retorqued or reused if the feeder changes. A compression lug is one size only and needs a matching die and crimper, but gives a permanent connection some specs call for. For MRO stock and retrofit work the mechanical lug keeps the shelf count down.

Individually. The selling unit is each, so a panel change-out needing three phase conductors and a neutral means ordering four.

Country of origin is Mexico (MX), which is what you would put on a public-project or federal-contract origin declaration for this copper terminal.