An externally hosted image should be here but it was not working when we last tested it.
the package says it is. LM1875 is TO-5, no? what's going on? i don't see how this is going to isolate the chip from the heatsink. sorry there's nothing in the picture for scale. i had to use the scanner. camera is with sister. the pad about 1 cm across.
ermz I think this is used for the metal can type of transistors...you place the stuff on a PCB or small heatsink (which is rarely needed) and than the transistor OVER it...meaning only the 3 legs protude out from the rubber insulator...then you solder it in place...
Yes that is a TO-5 insulator but no it is not the correct size insulator for LM1875. IIRC, TO-5 is a small round metal can package used for some transistors etc.
the lm1875 uses a pentawatt (sp?) case which looks similar to a to220 case, but with 5 staggard leads instead of 3 straight leads.
You should try finding a rectangular mica or silicon based insulator...its about the size of the chip you are trying to isolate...slightly bigger in fact...
yeah..people make silly mistakes like this sometimes...you can get cheapo insulators if you look into broken or spoilt PC PSUs...they have some...just smear your own thermal grease...dun use artic silver~!
yeah...it's a spacer...sometimes it's used to insulate it from the ground plane in a double sided PCB...
travis said:
I think the datasheet calls the package something like TO-220-5, at any rate, whatever they call it, just bear in mind that they are somewhat larger than a standard TO-220 package so insulators meant for normal TO-220 will be of no use.
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