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3.945" Wide Extruded Aluminum Heatsink

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3.945" Profile - choose length to generate SKU and calculate price

 Detailed 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.

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 Product Reviews

  1. Beautiful piece

    Posted by TB on 1st May 2015

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

  2. 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.

  3. 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.

  4. Excellent heatsink

    Posted by Unknown 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!

  6. Fantastic Quality and Fast Shipping

    Posted by Unknown 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!

  7. High Quality at a Good Price

    Posted by Henry on 11th Feb 2014

    I used two of this style for an amplifier project and was impressed with the beautiful finish, perfect cuts and quick shipping. They arrived at my door perfectly due to being well packed for shipping. I'll never again resort to the inferior quality, questionable packing and poor value items offered by foreign vendors on ebay. Thanks H-USA for accommodating hobbyists like me.

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