I've got an electrically and thermally hot TO-220,
that needs mechanically securing to a grounded
heatsink.
Anodizing isolates the TO-220 from the heatsink, but
what do you guys use to isolate the mounting hardware
to prevent it from shorting the device to the sink?
Something that'll maintain the mechanical mating
force, despite long-term operation at >80c?
.----.
|////|
|////|
~ ~
TO-220 ~ ~
split | |////|
washer V |////|
| .-. |////| nut
V | | |////| /
.-. | | |////| .---./
_ | | | | |////| |___| bolt
/ || | | | /
_ '-^^^^^^^^^^^^^^^^^^^^^^^^^./
_| |
.-vvvvvvvvvvvvvvvvvvvvvvvvv'
\_|| | |___|
| | | | |////| | |
'-' / | |////| '---'
/ | |////|
/ | |////|<--.
| | |////| \
| | |////| Heatsink
The split washer maintains compression.
Is there something better than fiber washers / bushings?
Somehow I don't trust nylon heated in compression, esp. over
time. ISTM it will cook, then crumble.
TIA,
James
that needs mechanically securing to a grounded
heatsink.
Anodizing isolates the TO-220 from the heatsink, but
what do you guys use to isolate the mounting hardware
to prevent it from shorting the device to the sink?
Something that'll maintain the mechanical mating
force, despite long-term operation at >80c?
.----.
|////|
|////|
~ ~
TO-220 ~ ~
split | |////|
washer V |////|
| .-. |////| nut
V | | |////| /
.-. | | |////| .---./
_ | | | | |////| |___| bolt
/ || | | | /
_ '-^^^^^^^^^^^^^^^^^^^^^^^^^./
_| |
.-vvvvvvvvvvvvvvvvvvvvvvvvv'
\_|| | |___|
| | | | |////| | |
'-' / | |////| '---'
/ | |////|
/ | |////|<--.
| | |////| \
| | |////| Heatsink
The split washer maintains compression.
Is there something better than fiber washers / bushings?
Somehow I don't trust nylon heated in compression, esp. over
time. ISTM it will cook, then crumble.
TIA,
James