Sorry Jay. I did not try to order the material. I walked down to my
workshop and found the material that I have used. It is call Silver Ice
710 and is made by Timtronics out of NY. I had the stuff for a long
time. It is a gray grease and is not a change phase material. I looked
at the cut sheets on the Loctite and the Silver Ice 710. Looks like the
Silver Ice has a better electrical and thermal conductivity than the
Loctite. Tomorrow I will call my old company and get contact for Loctite.
------------------------------------------------------------------------
*From:* Jay Summet <[email protected]>
*Sent:* Monday, February 27, 2017 7:26 PM
*To:* ROBERT; Electric Vehicle Discussion List
*Subject:* Re: [EVDL] Silicon heat sink grease
Thanks for that link. Unfortunately, when I tried to order, it turns out
they are not in stock, have a minimum 53 piece order quantity, and a 5-6
week shipping delay.
[I also didn't know how many I'd need, because the 1.57 x 1.57 size does
not have any units on it, so I didn't know if it was mm, cm, or inches.]
Ideally if I was to use Silverstrate, I'd like to buy pre-cut TO-220 and
TO-247 sized pads for the MOSFETS and DIODES.
Jay
On 02/27/2017 08:24 PM, ROBERT wrote:
You can get the Loctite Silverstrate ECF1000 at Diverse Electronics.
http://www.diverseelectronics.com/products/Loctite-ECF1000-Silverstrate-AK-Phase-Change-Material-1-57-x-1-57-p7562/
LOCTITE ECF1000 Silverstrate AK Phase Change Material 1.57 ...
<http://www.diverseelectronics.com/products/Loctite-ECF1000-Silverstrate-AK-Phase-Change-Material-1-57-x-1-57-p7562/>
www.diverseelectronics.com
LOCTITE Silverstrate is an electrically conductive phase change thermal
interface material suitable for use between a heat sink and a variety of
heat dissipating ...
LOCTITE ECF1000 Silverstrate AK Phase Change Material 1.57 ...
<http://www.diverseelectronics.com/products/Loctite-ECF1000-Silverstrate-AK-Phase-Change-Material-1-57-x-1-57-p7562/>
LOCTITE ECF1000 Silverstrate AK Phase Change Material 1.57 ...
<http://www.diverseelectronics.com/products/Loctite-ECF1000-Silverstrate-AK-Phase-Change-Material-1-57-x-1-57-p7562/>
www.diverseelectronics.com
LOCTITE Silverstrate is an electrically conductive phase change thermal
interface material suitable for use between a heat sink and a variety of
heat dissipating ...
www.diverseelectronics.com <http://www.diverseelectronics.com>
Shop Electronics Products Online, Electronic Components ...
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LOCTITE Silverstrate is an electrically conductive phase change thermal
interface material suitable for use between a heat sink and a variety of
heat dissipating ...
I just did a google search and got this supplier. This compound is
electrically conductive. I would be careful. Very seldom have I used a
conductive thermal compounds. I would check conductivity between the
lead and the device. And for sure, I would check conductivity after I
installed the Diodes and Mosfets.
------------------------------------------------------------------------
*From:* EV <[email protected]> on behalf of Jay Summet via EV
<[email protected]>
*Sent:* Monday, February 27, 2017 6:13 PM
*To:* [email protected]
*Subject:* Re: [EVDL] Silicon heat sink grease
That depends upon your application. Between the controller's outside and
the base plate, I agree with you.
However, I'm using this between the MOSFETS and DIODES and the interior
heatsync, which also doubles as one of the power rails. The circuit is
designed such that the mosfets and diode cases must be electrically
connected to the heatsync. (The heatsync is electrically isolated from
the case by a SiPad.)
So I'm looking specifically for something that will conduct electricity
AND heat. (The MOSFET's and DIODES are connected via a screw, which will
conduct electricity, but I figure the lower the resistance the better.)
The carbon grease is electrically and thermally conductive, but it
appears to be designed for switch contacts more than simiconductor
heatsync applications, and is probably not as conductive as a silver
grease, so I'm still poking around looking at what my options are to
purchase.
Jay
On 02/27/2017 04:55 PM, Mark Hanson via EV wrote:
Hi folks
Heat sink grease should be NON conductive electrically but thermally conductive
white grease. You can also use thermosil less thermally conductive but less
messy or Kapton.
Best regards
Mark
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