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From $3.80 to $22.80
Description Thickness Width Length Part Number Buy
Copper Bus Bar .125 1/2" 1 ft 03-40890-1 $3.80
Copper Bus Bar .125 1/2" 2 ft 03-40890-2 $7.60
Copper Bus Bar .125 1/2" 3 ft 03-40890-3 $11.40
Copper Bus Bar .125 1/2" 4 ft 03-40890-4 $15.20
Copper Bus Bar .125 1/2" 5 ft 03-40890-5 $19.00
Copper Bus Bar .125 1/2" 6 ft 03-40890-6 $22.80
Subtotal $0.00
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Copper Bus Bar
.125 X 1/2" wide

If mfg test reports are required there is a minimum $15.00 charge per order. Charge is higher if more than 5 items. P/N is “certs” - please indicate at time of order in the special instructions box.

*Sold by the foot
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Works well with longer screws. If you want it softer, heat with a torch until cherry red, then quickly quench in cold water.

June 8, 2019

As others have already noted, it is very thick so youll need longer screws for your breakers depending on number of ring connectors youre using in addition to the bus bar. I also used the scotch brite wheel on the bench grinder to clean up the surfaces.

Ray A
May 28, 2019

As advertised - my only complaint is this bar is too thick - I wish ACS stocked a 1/16 x 1/2 bus bar. A 1/8 x 1/2 bus bar is rated over 200 amps continuous duty with a 50 degree Celsius temperature rise far more than the power generating capacity of most GA aircraft. You will need longer screws to attach this bar to circuit breakers, and copper heavier than steel 1/16 would be much better. Copper is different to machine - lubricant is necessary and you have to apply light pressure on the drill, otherwise bits will grab the soft metal and break.

Daniel L
February 4, 2018

I guess it is what one would call good material, but perhaps too good. The copper is so hard that it is tough to drill holes for the breaker screws even with a drill press. I noted the comment re too thick for the supplied Klixon screws - it is, and 6/32 x 1/4 are too short and 6/32 x 3/8 too long for Klixon 7277 breakers where one ends up having the screw threads pushing up against the bottom of the breaker. My solution was piling 3 washers on top to take up the length. Cutting each 3/8 screw to 5/16 was not really all that viable and it seems that there are not any 6/32 x 5/16 available anywhere. My thinking is that a softer thinner buss bar should be offered - perhaps 1/16 thick and soft copper. The 1/2 width is good and being able to buy by the foot is good as well. Pre-drilled holes are not desirable, hence undrilled as it now is works well, but softer so one can actually drill into the copper.

Bruce B
January 13, 2018

AS advertised

Michael L
November 26, 2017

This is a quality high amp buss bar. Do note that its quite thick so some supplied CB screws (Klixon for example) are too short when using this buss bar and youll need some slightly longer screws.

Andrew A
July 6, 2017


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