SW38-2G datasheet(103/116 Pages) AAVID

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Insulators – Mica and ThermalsilTM III

Mica and Thermalsil

TM III

ORDERING INFORMATION

Part number

Description

Device

"A" Dim

"B" Dim

"C" Dim

"D" Dim

Figure

56-77-9G

Mica

TO-220

18.42 (0.725)

13.21 (0.520)

4.32 (0.170)

2.92 (0.115)

56-03-2G

Mica

TO-3

42.04 (1.655)

27.00 (1.063)

3.96 (0.156)

1.57 (0.062)

53-77-9G

ThermalsilTM III

TO-220

18.42 (0.725)

13.21 (0.520)

4.32 (0.170)

2.92 (0.115)

53-03-2G

ThermalsilTM III

TO-3

42.04 (1.655)

27.00 (1.063)

3.96 (0.156)

1.57 (0.062)

Property

Electrical

Dielectric strength

172 X 103 volts/mm (4500 volts/mil)

0.025 mm to 0.076 mm thick in air (1 to 3 mils thick in air)

Dielectric constant

6.5 to 8.7

Dissipation factor

0.0001-0.0004 @ 106 Hz

Volume resistivity

1015 ohm-cm

Physical

Modules of elasticity in tension

172 X 103 Mpa (25 X 106) psi

Tensile strength

310 Mpa (45,000 psi)

Hardness mohs, shore

3.0, 115

Compressive strength

2.21 X 108 Pa (32,000 psi)

Specific gravity

2.9

Thermal

Thermal conductivity

0.528 W/(m °C ) (0.30 Btu/hr-ft °F)

Coefficient of thermal expansion

3.24 X 10-5 °C (1.8 X 10-5 °F)

Specific heat

0.084 KJ/Kg °C (0.02 Btu/Lb °F)

Melting point

1275°C (2327 °F)

Max. operating temperature

550 °C (1022 ºF)

TYPICAL PROPERTIES FOR MICA INSULATORS

Thermalsil™ III provides excellent thermal conductivity

and electrical resistance. It is used as an electrically-isolat-

ing interface material composed of silicone elastomer

binder with a thermally conductive filler. It is reinforced

with glass cloth to resist tearing and cut-through due to

burrs on transistors or heat sinks.

Thermalsil™ III eliminates the need for grease application

and conforms to mounting surfaces under clamping pres-

sure for optimum heat conduction. The finely woven glass

cloth provides the thinnest possible matrix for enhanced

thermal resistance. Thermalsil™ III is available in any con-

figuration with adhesive backing.

Mica insulators provide high maximum operating temper-

atures (550°C) and excellent electrical properties.

FIGURE A

FIGURE B

"B"

30.15

(1.187)

10.92

(0.430)

"A"

1.83

(0.072)

"C"

DIA

TYP(2)

"D"

DIA

TYP(2)

"A"

"B"

"C"

"D"

DIA

Property

Typical value 25°C

Test method

Electrical

Dielectric constant

2.5@50 Hz

ASTM D-150

2.5@103 Hz

2.5@106 Hz

Dielectric breakdown voltage 26.3 x 103 volts/mm (667 volts/mil)

ASTM D-149

Volume resistivity

5.7 x 1015 ohm-cm

ASTM D-257

Dielectric dissipation factor

0.008@50 Hz

ASTM D-150

0.004 @103 Hz

0.004 @106 Hz

Physical

Thickness

0.15mm

(0.006 inch)

Color

Gray-Green

Tensile strength

6.1 x 107 Pa (8786 psi)

Hardness, shore A

Elongation

2% or less

Thermal

Thermal conductivity

0.92 W/(m °C ) (0.532 Btu/hr. ft °F)

Flame resistance

UL 94V-0

UL card #E-58126 (S)

Service temperature

-60°C to 180°C

(-76°F to 356°F)

TYPICAL PROPERTIES FOR THERMALSIL

TM III

SW38-2G Datasheet(PDF) 103 Page - Aavid, Thermal Division of Boyd Corporation

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