Toe Cutter
New Member
Hello. I am replacing some TO-247 transistors and I am trying to figure out what type of insulator to use. It looks like the old insulator was made of Kapton with a waxy coating. It measures 22x28 mm. I'm guessing the waxy coating is intended to melt when the transistor heats up and create a better thermal interface. A phase-change material?
Does anyone know who makes insulators like this? I've looked at mouser, avid, and others. The closest I could find was Mouser p/n: 532-43-77-20, but no mention of any coating.
If I buy Kapton-type insulators _without_ the waxy coating should I use conventional silicon thermal grease?
I attached a picture of a transistor and insulator I pulled. Notice how the white waxy stuff adheres to the transistor. Thanks.
Does anyone know who makes insulators like this? I've looked at mouser, avid, and others. The closest I could find was Mouser p/n: 532-43-77-20, but no mention of any coating.
If I buy Kapton-type insulators _without_ the waxy coating should I use conventional silicon thermal grease?
I attached a picture of a transistor and insulator I pulled. Notice how the white waxy stuff adheres to the transistor. Thanks.