Mica washer insulator - how os called that rubber thing?

[zaoka]

What is the name if that grey rubber thing used instead of mica washers for transistors?

I need that in bigger size, is it available from Digikey?

http://www.westfloridacomponents.com/mm5/graphics/00000001/TR98-0008-SC.jpg

[WarSim]

They go by many names like sil-pad.  That are in digikey by various manufacturer in the same area as mica.  Thermal management, I believe.  They come in different isolation voltages, and thermal resistances, sizes, thicknesses, compounds,

Non sure which package you are looking for given the picture with no dimensions. 

[David_AVD]

I'm guessing by the relative size of the hole the picture is of a TO-220 one?  The larger package is called a TOP-3 sometimes.

[wraper]

Thermal pad, sil-pad, SMICA, thermally conductive pad, silicone rubber, etc... They often are under different names in different catalogs.

[Experimentonomen]

There are three main kinds of these insulators, the worst one is the Sil-pad, the next best one is the mica sheet, and the best one is the Aluminum oxide one which is also the most expensive one.

[Monkeh]

"Best", "worst", try different for different applications.

[Jay_Diddy_B]

Hi,

One of the leading manufacturers in this area is Bergquist.

http://www.bergquistcompany.com/thermal_materials/gap-pad.htm

They are the owners of the trademark 'sil-pad'

Jay_Diddy_B

[G7PSK]

You can get sheets of sil pad type material from E bay.

http://www.ebay.co.uk/itm/Blue-100mmx100mmx2mm-GPU-CPU-Heatsink-Cooling-Thermal-Conductive-Silicone-Pad-/190704123549?pt=US_Thermal_Compounds_Supplies&hash=item2c66d9fe9d

[wraper]

You can get sheets of sil pad type material from E bay.

http://www.ebay.co.uk/itm/Blue-100mmx100mmx2mm-GPU-CPU-Heatsink-Cooling-Thermal-Conductive-Silicone-Pad-/190704123549?pt=US_Thermal_Compounds_Supplies&hash=item2c66d9fe9d

This is a bit different stuff. It isn't meant for insulation. Just thermal interface for BGA and similar.

[ElektroQuark]

And it is 2mm thick!