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Old 13th December 2006, 03:18 AM   #1
zox2003 is offline zox2003  United States
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Question Aluminum Oxide vs. Sil Pad Insulators

VEry Important question for you who already used this two kind of insulators:

Which of this two are beter to use Aluminim Oxide or Silicon Pads insulators?

I am getting ready to install output transistors on heatsink and after I researched this topic could not make decision.

Aluminum Oxide pads are 2mm thick made for TO-247.

Silicon Pad Insulators I would need to make (cut) from 6" x 6" sheet I have.

Answer from your personall experience ,please!!

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Old 13th December 2006, 03:22 AM   #2
traw is offline traw  United States
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i use aluminum oxide especially in conjunction with to3p devices... ease of use and durability. have used them on rod elliot p101 and aleph's.
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Old 13th December 2006, 03:26 AM   #3
zox2003 is offline zox2003  United States
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I bought some at Mouser and they are 2mm thick.Is'nt that kind of thick for temperature transfer to heatsink?
How is thermal resistance of Aluminum Oxide comparasing to Mica or Sil PAds?

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Old 13th December 2006, 03:29 AM   #4
zox2003 is offline zox2003  United States
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Do I need to use thermal compound with Aluminum Oxide Pads to make thin layer between transistor and pad and pad and heatsink?
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Old 13th December 2006, 03:46 AM   #5
CBS240 is offline CBS240  United States
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Quote:
Originally posted by zox2003
I bought some at Mouser and they are 2mm thick.Is'nt that kind of thick for temperature transfer to heatsink?
How is thermal resistance of Aluminum Oxide comparasing to Mica or Sil PAds?

Regards

IMO, mica works well for the price. Just be sure surface is smooth and use enough heat sink goo.
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Old 13th December 2006, 03:48 AM   #6
zox2003 is offline zox2003  United States
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I do not have MICA insulators.Just Aluminum Oxide and Silicone Pads Insulators....
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Old 13th December 2006, 03:51 AM   #7
CBS240 is offline CBS240  United States
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http://www.mouser.com/search/refine....mica+insulator


no exp. with aluminum oxide.
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Old 13th December 2006, 03:56 AM   #8
zox2003 is offline zox2003  United States
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ONCE AGAIN:

I do not have MICA insulators.Just Aluminum Oxide and Silicone Pads Insulators....and I am getting ready to install output transistors
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Old 13th December 2006, 05:05 AM   #9
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One of previous threads:

Silicone VS mica pads - pros/cons?
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Old 13th December 2006, 05:22 AM   #10
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nevermind
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