Keratherm Transistor Insulators
- 6 x Kerafol "Keratherm® Red" premium insulators
Problem: You need an easy to use, non-electrically-conducive material between your transistors and heatsinks.
Solution: Keratherm.
Kerafol Keratherm 86/82 is regarded as the best in the business.
The material is silicone and fiberglass impregnated with ceramic. In normal use it can match or even exceed the performance of mica and grease.
Dimensions are 32mm x 23mm, which will fit TO-247, TO-3P, and TO-218. Users can it to fit TO-220 and smaller packages. One side is smoother than the other, and have consulted at length with manufacturer. They advised us that either side can be used in contact with the heatsink or transistor.
We guarantee this is 100% original Keratherm Red sourced from the original manufacturer, Kerafol.
Usage notes:
- Peel the pink "sliver" of Keratherm away from the backing.
- The Keratherm is delicate "pink" colored material
- Do not use thermal grease.
- Be careful to not tear or puncture the Keratherm during installation. Ensure that all all swarf and debris are cleaned from heatsinks and devices.
Specifications:
- Model: 86/82
- Format: XXXX-028 (To suit TO-247, TO-3P and TO-218)
- Color: Red (Pink). Color varies slightly from batch to batch,
- Datasheet
- Dimensions
Sized and cut nicely for TO-220 -- works really well, and "no grease" is really a timesaver for me.
But I bought these for a TO-3 application, and the pads are not sized for that. So, not so good.
Worked very well for a power 15 pin amplifier chip
Far better than mica and goop. No muss, no fuss, and no dirty fingers. I wouldn’t use anything else.
Great product, very fast delivery from the DIYAUDIO store, thanks for making these available.
I have not been able to use them yet, but I am happy to not have to buy them in bulk. Thanks guys!
I was worried that the fets in my F2J were running too hot with generic silicon rubber pads. With these Keratherm pads I have a 25% reduction in case temp of the fets. I can now sleep at night.....
- 5 stars: 43 (96%)
- 4 stars: 1 (2%)
- 3 stars: 1 (2%)
- 2 stars: 0 (0%)
- 1 star: 0 (0%)
Sized and cut nicely for TO-220 -- works really well, and "no grease" is really a timesaver for me.
But I bought these for a TO-3 application, and the pads are not sized for that. So, not so good.
Worked very well for a power 15 pin amplifier chip
Far better than mica and goop. No muss, no fuss, and no dirty fingers. I wouldn’t use anything else.
Great product, very fast delivery from the DIYAUDIO store, thanks for making these available.
I have not been able to use them yet, but I am happy to not have to buy them in bulk. Thanks guys!
I was worried that the fets in my F2J were running too hot with generic silicon rubber pads. With these Keratherm pads I have a 25% reduction in case temp of the fets. I can now sleep at night.....
excellent alternative to messy mica and grease.
A great service having these made available by THE STORE.
Unlike many stores attached to websites - this one is well run.
Orders are sent out within hours of receipt.
Easy to use and very friendly unlike that old mica
Does the job in efficiently providing electrical isolation with heat condution
Great product
Easier to use vs the mica insulators.
@diyaudiostore,
good job making available what you make available
very happy with them. Nice to have a reliable supplier. I just wish they had more stuff available.
These electrical insulators/heat conductors are excellent ant easy to work with. NO MORE PASTE! Nice.
A little pricey, but perform well and are very convenient.
I keep extras on hand, never can tell when the itch to build another Firstwatt clone might come along.
I bought many of them in the past years and I always want to have some spares in my lab. They are really great isolators, easy to use and with impressive performance.
Cheers
Keratherm gave my aleph j build great thermal conduction. And DiyAudiostore are very reliable and have the best communication with me as costumer
Easy to apply with plenty of coverage for LM3886. In fact I had to trim a little with scissors and it was super easy to cut. My experience is that the pad will lightly "stick" to the chip or transistor while you are aligning everything, but not adhere so much you can't reposition it before final tightening. Transfers heat well - I'm pleased. Chip cool - heatsink warm. It's great having a source for hard t to find parts - thanks DIYStore!
Much easier to use vs the mica insulators and thermal grease on my build.
I'm not new to Keratherms, having bought them before. Outstanding thermal conduction, far superior to the average white silicon compound. As usual, the DIY audio store provides great service, communicates well and should be a first choice for anyone looking for top quality DIY parts and kits. Support our community, keep it alive!
Yes, they are more expensive than thermal paste and mica insulators, but they are so much cleaner and neater. I first became acquainted with these in my amp camp build and I love them. They work well and they seem give a consistent insulation to the F 5 amp I am building.
Great well made, quality product. And very happy with the quality of the transistor insulators. Excellent fast service.
Item was quickly dispatched and very happy with the quality. Many thanks
Excellent service and fast shipping as usual. Awesome to be able to buy these in this quantity thanks to the store!
The Keratherm insulators are a great item, and our DIY store has made it very easy to obtain them.
Perform perfectly exactly how they should. It’s nice to only be able to buy what you need instead of having to buy a whole entire sheet to get a hold of this particular material .
Received in California only 1 week after ordering. I'm pleased.
Keratherm Transistor Insulators
Easy transaction to complete. Arrived quickly and in excellent shape. Just what the Doc ordered.
Great
Keratherm Transistor Insulators
Very easy with those things! Place on the heat sink, screw the transistor, done!
Keratherm Transistor Insulators