Need insulator for BD139/TO126

[fubar3]

I got TO220 mica and this fragile thermal tape 567-DST-38-1-76X127. Maybe the tape can be divided?
What should I get to fit BD139 SOT-32 / TO126.

 

[wg_ski]

I just use TO-220 micas/sil-pads for anything smaller. If they stick out too much or overlap cut them down.

 

[fubar3]

Hi @wg_ski. I never ordered these 'pads' before so I was just looking for a part number of a practical choice.

Sil-Pad is a trade name for 346 entries in the search. There is only 1 type 'Silicon Pad' and it is a factory special order.

 

[rayma]

https://www.mouser.ca/ProductDetail/Wakefield-Thermal/CD-02-05-126?qs=MLItCLRbWsy0eKQ2sZSpiA%3D%3D
https://wakefieldthermal.com/wakefield-thermal-phase-change-pad-to-126-pad-hole-cd-02-05-126/
https://www.digikey.com/en/products/detail/wakefield-vette/CD-02-05-126/9369973

 

[fubar3]

Mfr. Part # CD-02-05-126 , Mouser Part # 567-CD-02-05-126
Thanks, I found it on Mouser

 

[wg_ski]

Sil-Pad is a trade name for 346 entries in the search. There is only 1 type 'Silicon Pad' and it is a factory special order.

I call anybody’s silicone insulator a “sil-pad”, even if it’s not Bergquist. I gravitate toward 6 mil K10, buying both the individual units and the 11.5x12 sheets. When you have a row of TO-264’s closely spaced a strip of it is easier than jacking around with more expensive individual units.

Still have some old micas left over, probably never run out.