1. Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
    Dismiss Notice

In need of a large heatsink

Discussion in 'Buy, Sell and Trade' started by DerStrom8, Aug 23, 2014.

  1. DerStrom8

    DerStrom8 Super Moderator Most Helpful Member

    Joined:
    Aug 9, 2010
    Messages:
    5,484
    Likes:
    503
    Location:
    Vermont (GMT-5:00)
    Hi guys,

    Once again I find myself in need of a large heatsink. The parts being mounted to it form a rectangle with dimensions 4.33" x 6.3" (110mm x 160mm), so I'm looking for a heatsink with sides at least those lengths. Unfortunately the parts MUST remain together, so turning them is not an option. If anyone has any large heatsinks laying around unused, feel free to contact me. Maybe we can work out a deal!

    Thanks,
    Matt
     
  2. ronsimpson

    ronsimpson Well-Known Member Most Helpful Member

    Joined:
    Apr 17, 2007
    Messages:
    7,253
    Likes:
    961
    Location:
    Loveland, CO USA
    Picture please
    Are the parts inside the 4x6 rectangle?
    Can you use a heat sink with a fan?
     
  3. DerStrom8

    DerStrom8 Super Moderator Most Helpful Member

    Joined:
    Aug 9, 2010
    Messages:
    5,484
    Likes:
    503
    Location:
    Vermont (GMT-5:00)
    Hi Ron, sorry--meant to post a picture before.

    The parts are two CM300 half-bridge IGBT modules mounted side-by-side, as seen in this photo underneath the large electrolytic capacitor:

    GEDC0084.png

    The modules, when placed next to each other like this, make a 4.33" x 6.3" rectangle, so the heat sink would have to be larger than that in order for them to fit. Depending on the style, a heat sink with a fan would be great--I plan to use a fan anyway.

    Thanks!
    Matt
     
  4. dave

    Dave New Member

    Joined:
    Jan 12, 1997
    Messages:
    -
    Likes:
    0


     
  5. KeepItSimpleStupid

    KeepItSimpleStupid Well-Known Member Most Helpful Member

    Joined:
    Oct 30, 2010
    Messages:
    9,915
    Likes:
    1,096
  6. DerStrom8

    DerStrom8 Super Moderator Most Helpful Member

    Joined:
    Aug 9, 2010
    Messages:
    5,484
    Likes:
    503
    Location:
    Vermont (GMT-5:00)
    Thanks for the links, KISS.

    I said "large" because it would be nice to have a little extra room to mount other devices, but it's really not necessary. That second link is great, I may use that--the prices are much better than what I was finding on ebay.

    Matt
     
  7. ronsimpson

    ronsimpson Well-Known Member Most Helpful Member

    Joined:
    Apr 17, 2007
    Messages:
    7,253
    Likes:
    961
    Location:
    Loveland, CO USA
    I thought I had the heat sink but not so.
    I have a 8 foot lengths of heat sink that is 45mm across and the fin height is 25 or 14mm. Two pieces is not wide enough.
    I also have some 3 inch square pieces with fans.
    There is also a 8 foot length of "audio amp TO-3 " heat sink but the fins are on both sides. The big mill is not running so I can't mill off some of the fins.
    I can send pictures.
     
  8. KeepItSimpleStupid

    KeepItSimpleStupid Well-Known Member Most Helpful Member

    Joined:
    Oct 30, 2010
    Messages:
    9,915
    Likes:
    1,096
    It too me all of 2 searches to find it. Search #1: "large heatsinks", Search #2: "Extruded Heatsinks"
     
  9. DerStrom8

    DerStrom8 Super Moderator Most Helpful Member

    Joined:
    Aug 9, 2010
    Messages:
    5,484
    Likes:
    503
    Location:
    Vermont (GMT-5:00)
    Thanks Ron and KISS.

    KeepItSimpleStupid , it looks like the shipping costs are really where they get you on HeatsinkUSA. It'll cost $35 to get the smallest usable size, and while that may seem cheap overall, I really need to watch how much I spend on this project. I am significantly over-budget as it is :p

    I am actually hoping to sell off some of my older stuff, or things I bought and realized I wouldn't need....

    Thanks again,
    Matt
     
  10. KeepItSimpleStupid

    KeepItSimpleStupid Well-Known Member Most Helpful Member

    Joined:
    Oct 30, 2010
    Messages:
    9,915
    Likes:
    1,096
    From theor site:

    It should fit into a USPS flat rate box for about $6.00 shipping + their $5.00 handling. US sipping usually runs about $10-$12 minimum.
     
    • Thanks Thanks x 1
  11. DerStrom8

    DerStrom8 Super Moderator Most Helpful Member

    Joined:
    Aug 9, 2010
    Messages:
    5,484
    Likes:
    503
    Location:
    Vermont (GMT-5:00)
    I'll keep looking over my options, but that does seem the most promising at this point. Thanks a lot KISS!

    Matt
     

Share This Page