Created with Sketch. Created with Sketch.
Toggle menu
1-800-901-2395

Shop by Category

  • 0.601"
  • 1.000"
  • 1.813"
  • 2.000" Round
  • 2.000" Serrated Fin
  • 2.079"
  • 2.425"
  • 3.500"
  • 3.945"
  • 4.230"
  • 4.600" Serrated Fin
  • 4.850"
  • 4.900"
  • 5.000" SSR Heatsink
  • 5.375"
  • 5.886"
  • 6.080"
  • 7.984"
  • 8.000"
  • 7.280"
  • 8.460"
  • 8.000" Serrated Fin
  • 10.000"
  • 10.080"
  • 12.000"

    • Shop by Brand

  • HeatsinkUSA
  • View all Brands
  • 3.945" Wide Extruded Aluminum Heatsink

    • 3.945" Wide Extruded Aluminum Heatsink

    $3.86 - $289.50
    (10 reviews) Write a Review
    SKU:
    3.945

    Product Description

    Extruded Aluminum Heatsink
    Alloy:  6063-T6
    Width: 3.945"
    Fin Height: 2.5"
    Base: .375"
    C/W/3": approximately 1.40
    Weight per Inch: .40 lb

     

    All of our heatsink extrusions are sold by the inch.  To order a more specific length, for example a length of 5.5", you would choose 6" and and indicate your desired cut length in the "Specific cut length" field above.  If you have any questions, please give us a call or send us an email, we would be happy to assist you.

    Product Videos

    Custom Field

    Product Reviews

    Write a Review

    10 Reviews Hide Reviews Show Reviews

    • 5
      Excellent heatsink

      Posted by Gerardo A Gonzalez on 11th Sep 2020

      Best quality, sharp cut. Fast shipping

    • 5
      Heat sink

      Posted by Mark Brownawell on 7th Jun 2020

      This heatsink is a good dissapator

    • 5
      3.945" heatsink

      Posted by Darren John Sanders on 22nd Mar 2018

      One word, Beast. .....

    • 5
      Beautiful piece

      Posted by TB on 1st May 2015

      Beautiful piece. Like a trophy. A shame to have to drill it to use it.

    • 5
      Excellent Quality, Affordable Heatsink

      Posted by Jon on 10th Feb 2015

      I've struggled for years looking through the big electronics outfitters for heatsinks to fit my parts. I've always had to end up cutting into expensive anodized aluminum heatsinks to get them to properly fit to my parts. This 3.945" heatsink is perfect. It came cut to my length specifications very quickly. The machining is precise and the material is of high quality. (Note, the aluminum is bare stock, non-anodized). These are perfect for rapid prototyping or small quantity runs.

    • 5
      A very large fin heatsink.

      Posted by Len Flint on 23rd Jan 2015

      This large sink was cut very straight, and the bottom surface was quite flat. I only had to do a minimum of fine sanding to get an almost mirror finish. I'm testing a 4" piece with a 45 watt LED COB and in stagnant air it's temp only went up to 55 degrees C, with a small breeze it dropped back down to just above ambient. These tests were in the less than desirable horizontal plane.

    • 5
      Excellent heatsink

      Posted by Anonymous on 28th Aug 2014

      Incredible price for a very heavy duty heatsink. Very fast shipping. Will buy from again.

    • 5
      Great price for a great heat sink

      Posted by Tim on 8th Aug 2014

      This was a perfect fit for our lighting project and the price was better than an overseas vendor. Great to do business here in the USA! Look foreword to a long term friendship!

    • 5
      Fantastic Quality and Fast Shipping

      Posted by Anonymous on 11th Jul 2014

      The cuts were very good quality, the base was very flat, and the finish good. I would definitely order from again!
    HeatsinkUSA, LLC, Aluminum Fabrication, Greenville, MI