7022BG Datasheet, PDF (104/116 Pages) Aavid, Thermal Division of Boyd Corporation – Channel style heat sink with folded back fins

Insulators – Aluminum Oxide
Aluminum Oxide
Aluminum oxide has unique thermal conductivity qualities
and features low loss factors at high frequencies. It has high
compressive strength, high volume resistivity, low thermal
expansion and resists radiation.
Aluminum oxide insulating washers have a dielectric strength
of approximately 21.7 x 10³ volts/mm for .76mm material (550
volts/mil for 0.030 inch material) and 16.9 x 10³ volts/mm for
1.57mm material (430 volts/mil for 0.062 inch material). The
thermal conductivity of aluminum oxide is 15.06W/(m°C) at 75°C.
PROPERTY
A1203
Dielectric constant 25‚°C (77°F)
Dissipation factor 25°C (77°F)
Electrical resistivity 25°C (77°F)
Dielectric strength (AC)
Density
Hardness
Flexural strength 25°C (77°F)
Modules of elasticity
Poisson’s ratio
Tensile strength 25°C (77°F)
Compressive strength 25°C (77°F)
Coefficient of thermal expansion
Thermal conductivity
Specific heat (100°C)
Melting point
Maximum temperature for
continuous use
CHEMICAL – TYPICAL VALUE
TEST METHOD
94% nominal
Spectrographic analysis
(100%-% by wt. of total
metallic impurity)
ELECTRICAL
8.9 (1MHz)
ASTM D150-70
8.9 (10GHz)
ASTM D2520-70
0.0001 (MHz)
ASTM D150-70
0.0010 (10GHz)
ASTM D2520-70
>10¹⁴ ohm-cm
ASTM D1829-66
8.66 x 10³ volts/mm (6.35mm thick)
ASTM D116-69
[220 volts/mil (0.250” thick)]
16.73 x 10³ volts/mm (1.27mm thick)
[425 volts/mil (0.050” thick)]
28.35 x 10³ volts/mm (0.25mm thick)
[720 volts/mil (0.010” thick)]
PHYSICAL
3.62 g/cm³ (226 lb/ft³)
ASTM C20-70
78 (Rockwell 45 N)
ASTM E18-67
MECHANICAL
3.17 x 10⁸ Pa (minimum) [46.00 psi (minimum)]
ACMA Test #2
3.52 x 10⁸ Pa (typical) [51,000 psi (typical)]
2.83 x 10¹¹ Pa (41 x 10⁶ psi)
ASTM C623-69T
0.21
ASTM C623-69T
1.93 x 10⁸ Pa (28,000 psi)
ACMA Test #4
2.10 x 10⁹ Pa (305,000 psi)
ASTM C528-63T
THERMAL
7.9 x 10⁶/°C (4.4 x 10⁶/°F)
ASTM C372-56
18.01 W/(m°C) @ 25°C
ASTM C408-58
14.24 W/(m°C) @ 100°C
79.56 W/(m°C) @ 400°C
8.79 x 10⁴ KJ/kg°C [2.1 x 10⁴ Btu/lb °F]
ASTM C351-61
>3600°C (6512°F)
1700°C (3100°F)
Aluminum Oxide for TO-3
ORDERING INFORMATION
Part number Thickness “A” Dim
“B” Dim
“C” Dim “D” Dim “E” Dim
4103G*
1.91 (0.075) 39.70 (1.563) 26.67 (1.050) 13.34 (0.525) 4.75 (0.187) 30.40 (1.197)
4104G*
1.78 (0.070) 44.45 (1.750) 31.75 (1.250) 15.88 (0.625) 7.16 (0.282) 30.15 (1.187)
3.68
(0.145)
DIA TYP (4)
"A"
1.83
(0.072)
"C" RAD
TYP (2)
5.46
(0.215)
"D"
RAD
TYP (2)
10.92
(0.430)
"B"
15.09
(0.594)
"E"
Aluminum Oxide Ceramic for TO-220
"D"
ORDERING INFORMATION
Part number Thickness “A” Dim
“B” Dim “C” Dim “D” Dim “E” Dim
4169G*
1.57 (0.062) 19.30 (0.760) 13.97 (0.550) 4.78 (0.188) 6.98 (0.275) 3.68 (0.145)
4170G**
1.78 (0.070) 19.30 (0.760) 13.97 (0.550) 4.78 (0.188) 6.98 (0.275) 3.68 (0.145)
4171G**
1.78 (0.070) 16.51 (0.650) 12.70 (0.500) 4.32 (0.170) 6.35 (0.250) 3.81 (0.150)
4177G**
1.78 (0.070) 17.45 (0.687) 14.27 (0.562) 5.54 (0.218) 7.14 (0.281) 3.18 (0.125)
"C"
"A"
"E"
DIA
"B"
Aluminum Oxide Ceramic for TO-218, TO-247, and TO-3P
ORDERING INFORMATION
Part number Thickness “A” Dim
“B” Dim “C” Dim “D” Dim “E” Dim
4180G*
1.78 (0.070) 23.24 (0.915) 18.80 (0.740) 6.98 (0.275) 9.40 (0.370) 3.96 (0.156)
"B"
"D"
"A"
"C"
"E"
104
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