CPU Adhesive tape vs Silipad

[jgwinner]

Folks:

After a frustrating hour in Fry's, I can not find extra Silipad insulators for my TO-3p mosfet's.

I did find some "CPU Thermal tape" which is for sticking a CPU to a heat sink. There's no grounding issues there, so I don't know if this will inslulate or not. It will be a mounting method (no bolts) as well as good thermal condutivity.

Do you think I can use the CPU tape for my amp?

 

[Peter Daniel]

What's TO-3p? Is it the same as TO-3? I've got a lot of these pads.

 

[till]

isn´t TO3p = TO3 plastic synonym TO-247 ? i thought so.

 

[fdegrove]

TO3

Hi,

Silverloaded thermal paste works fine too.

And I do believe the P stands for Plastic Casing.

Cheers,

 

[Circlotron]

Thermal resistance vs voltage rating

Watch the thermal resistance on some of those silpad type materials. The ones with a high voltage rating (often used for SMPS's etc) have pretty ordinary thermal performance. Also, the thinner the pad/tape is, the flatter your surfaces have to be.

I think TO3-P is like TO-247 but with a bit of the metal tab exposed around the top edge, also the mounting hole is not insulated like in the '47.

GP.

 

[jgwinner]

Right, like a TO-247; here's a picture:

Exicon 10N20

The non insulated is the big issue, it HAS to be isolated from the heat sink, or I'll be frying bacon instead of listning to music!

I don't see how thermal paste will help do that.

Where can I get some Silipad's? I couldn't find any at Mouser

 

[Jean]

Digikey has to3p pads. BER178-ND

 

[Sangram]

'CPU thermal tape' does not insulate.

 

[jgwinner]

Well, it's off to DigiKey then!

UPS is getting 1/2 of my project cost, one minimum charge at a time lol

Thanks folks, this forum is great.

 

[Jean]

S/H from Digikey is cheap, order some extra components to make up for that minimum order fee.

 

[jgwinner]

24 pads hit me for the 5 dollar handling fee, so I ordered 40.

I plan on bi-amping in the future, so I just ordered enough for all 10 of my amps. I have all the passive's too, same theory.

 

[samuelcpaul]

I agree its tough one to answer ..

But I go with Adhesive tapes.. why because the other thing wont go much competitive in this case.. And when my cars had the problem, I used it .. got the result.

Sam.

.

 

[theAnonymous1]

I agree its tough one to answer ..

But I go with Adhesive tapes.. why because the other thing wont go much competitive in this case.. And when my cars had the problem, I used it .. got the result.

Sam.

.

Thanks for the suggestion of the adhesive tape, Mr. Adhesive tape salesman.

I think they got it all sorted a little over 7 years ago though.