Making
an Airtight
Case for
Hermetically
Sealed
Packaging
A hermetic seal makes a given object
or package airtight, preventing the
passage of air, oxygen or other gases.
Hermetically sealed packaging is
essential to the correct and safe
functionality of many electronics,
especially for high reliability
applications such as aerospace,
downhole drilling and industrial.
5 types of high
reliability packaging
TO-3
PowerDIP
Ceramic DIP
PowerSIP
PowerQuad
.060 .002 [ 1.52 0.05] TYP.
.27 [6.8]
.093±.003
[2.36±0.08]
.475±.025
[12.07±0.64]
.0021
-A-
1.61 [40.9]
1.959 [49.76]
2.309±.010 [58.65 ±0.25]
.120
[
3.05]
TYP.
R .100 [R2.54]
TYP.
R .175
[R4.45]
TYP.
.32 [8.1]
.10 [ 2.5]
.815
[20.70]
.15
20.88
1.83
R.3
.076
TYP.
(2.178)
R.25
MAX
SEE DETAIL A
.25
SHIFTED
LEFT OF AXIS
3X
.25
SHIFTED
4X
10.725
RECOMMENDED PAD LAYOUT
PIN 1
.39
1.35
DETAIL B
SCALE 16.000
52X
