Keratherm Transistor Insulators
Problem: You need to use something to go between your transistors and heatsinks so they can transfer heat efficiently.
Thermal grease is a pain in the backside - it's painstaking to apply, it ends up stuck to everything within arms reach (certainly your fingers) and some preparations are highly toxic.
Solution: Keratherm. Clean, efficient, effective and easy to apply.
This is a pack of 10 Kerafol Keratherm Red transistor insulators. Keratherm is regarded as the best insulator in the business. Unfortunately it's only available if you can buy a thousand at a time. To help out our fellow DIYers, we've split up a large roll into handy 10 packs, because we feel everyone should be entitled to use this awesome product.
The insulators are placed in-between the face of the transistor and the heatsink. The transistor will be electrically insulated but also thermally conductive - allowing the heatsink to heat up and dissipate the heat from the device.
This material is a single solution - there is no need to use thermal grease - just place the insulator between the transistor and heatsink.
The Keratherm Red material is silicone and fiberglass material impregnated with ceramic that is thermally conductive. In normal use it can match or even exceed the performance of mica and grease. It is ideal for Class-A and Class-AB power amplifier devces and anywhere you need a good thermal interface.
Dimensions are 32mm x 23mm, which will fit TO-247, TO-3P, TO-218, and can be cut with scissors to fit TO-220 and smaller packages. One side is smoother than the other. We have consulted at length with manufacturer and they have advised us that either side can be used for heatsink or transistor.
We guarantee this is 100% original Keratherm Red sourced from the original manufacturer, Kerafol in Germany.
- Peel the pink "sliver" of Keratherm away from the backing (made of either plastic or a brown material)
- The part you want to use is the thin, floppy, delicate "pink" colored soft material
- Use of thermal grease is not recommended
- See photos for an example of how to use it in a real life project
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.
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.
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