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user4574
user4574
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I have done this to mount a 500A copper bus bar to a PCB, but the techniques should also be valid for aluminum.

  • First of all, the bus bar should be plated. Aluminum especially, is going to develop an insulating film if you don't plate it.

  • The pad on the PCB side should also have a plating that will not corrode if left exposed for extended periods of time (so not bare copper).

  • To make electrical contact with the PCB, we included a large, exposed, copperplated metal area under the entire bus bar (with a bit of clearance on either side to account for tolerances).

  • We used several screw holes in the bus bar that would clamp the bus bar to the PCB. In our particular case, it was four holes down the center of the bar, and the PCB used PEM nuts to receive the screws on the board side.

I have done this to mount a 500A bus bar to a PCB, but the techniques should also be valid for aluminum.

  • First of all, the bus bar should be plated. Aluminum especially, is going to develop an insulating film if you don't plate it.

  • The pad on the PCB side should also have a plating that will not corrode if left exposed for extended periods of time (so not bare copper).

  • To make electrical contact with the PCB, we included a large, exposed, copper area under the entire bus bar (with a bit of clearance on either side to account for tolerances).

  • We used several screw holes in the bus bar that would clamp the bus bar to the PCB. In our particular case, it was four holes down the center of the bar, and the PCB used PEM nuts to receive the screws on the board side.

I have done this to mount a 500A copper bus bar to a PCB, but the techniques should also be valid for aluminum.

  • First of all, the bus bar should be plated. Aluminum especially, is going to develop an insulating film if you don't plate it.

  • The pad on the PCB side should also have a plating that will not corrode if left exposed for extended periods of time (so not bare copper).

  • To make electrical contact with the PCB, we included a large, exposed, plated metal area under the entire bus bar (with a bit of clearance on either side to account for tolerances).

  • We used several screw holes in the bus bar that would clamp the bus bar to the PCB. In our particular case, it was four holes down the center of the bar, and the PCB used PEM nuts to receive the screws on the board side.

Source Link
user4574
user4574
  • 12.5k
  • 18
  • 33

I have done this to mount a 500A bus bar to a PCB, but the techniques should also be valid for aluminum.

  • First of all, the bus bar should be plated. Aluminum especially, is going to develop an insulating film if you don't plate it.

  • The pad on the PCB side should also have a plating that will not corrode if left exposed for extended periods of time (so not bare copper).

  • To make electrical contact with the PCB, we included a large, exposed, copper area under the entire bus bar (with a bit of clearance on either side to account for tolerances).

  • We used several screw holes in the bus bar that would clamp the bus bar to the PCB. In our particular case, it was four holes down the center of the bar, and the PCB used PEM nuts to receive the screws on the board side.