Standard Products - Thermalfilm Polyimide Plastic Films
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Products / Interface Materials / Insulating Films
Insulating Films
Thermalfilm™ Polyimide Plastic Films
RoHS Compliant
Thermalfilm™ and Thermalfilm™MT are low cost polymide plastic
insulating films designed to be an improved replacement for mica. These
insulators have a distinctive amber color and can be easily recognised
and assembled on a production line
Thermalfilm™MT, made from high performance Kapton™MT material,
provides thermal conductivity nearly 2-5 times greater than standard
Thermalfilm™.
Both insulators have an extremely high resistance to flow or thin out
under high compressive stresses, particularly at elevated temperatures.
Excellent physical, mechanical and electrical properties remain nearly
constant over a wide range of temperatures and frequencies. They are
radiation resistant, have no melting points, and have no known organic
solvents.
The polymide plastic film is UL listed as a component in UL's publication
"Component - Plastic Material" dated September 18, 1969. The UL card
number is E39505R, Guide QMFZ2 filed by E.I. du Pont de Nemours &
Co., Inc. Thermalfilm is rated 94 V-O.
Notes:
● Thermalfilm™ MT part numbers begin with "46".
● Insulator thickness is .05mm +/- 0.006mm (0.002" +/- 0.00025")
unless otherwise specified.
● Dimensional tolerances are +/- .38mm(.015"), hole diameters are
+/- .25mm (.010") and angularity is +/- 1 1/2° unless otherwise
specified.
For TO-3
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Standard Products - Thermalfilm Polyimide Plastic Films
Model A B C D
43-03-1 43.94
(1.730) 31.75
(1.250) 3.56
(.140) 1.57
(.062)
43-03-2 42.04
(1.655) 27.00
(1.063) 3.96
(.156) 1.57
(.062)
43-03-3 42.04
(1.655) 27.00
(1.063) 3.96
(.156) 4.22
(.166)
43-03-4 39.70
(1.563) 26.67
(1.050) 3.56
(.140) 1.57
(.062)
43-03-6 42.04
(1.655) 28.58
(1.125) 3.96
(.156) 1.57
(.062)
For TO-5 and TO-18
Part Number FIG. A B C
43-05-1
(TO-5) A9.91
(.390) 5.08
(.200) .91
(.036)
43-05-2
(TO-5) B9.91
(.390) 5.08
(.200) .91
(.036)
43-18-1
(TO-18) A6.35
(.250) 2.54
(.100) .91
(.036)
Washer
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Standard Products - Thermalfilm Polyimide Plastic Films
Part Number Thread A B
43-02-4 #4 6.35
(.250) 3.05
(.120)
43-02-10 #10 14.27
(.562) 5.16
(.203)
43-02-25 1/4" 20.62
(.812) 6.73
(.265)
For TO-220, TO-126, Case 77, Case 199, Case
90, TO-218, TO-3P
Part Number A B C D
43-77-1
(TO-126,case 77) 11.10
(.437) 7.92
(.312) 3.56
(.140) 2.36
(.093)
43-77-2
(case 90,case 199) 17.45
(.687) 14.27
(.562) 5.54
(.218) 3.18
(.125)
43-77-5
(case 90,case 199) 18.92
(.745) 13.84
(.545) 5.38
(.212) 3.18
(.150)
43-77-6
(case 90,case 199) 20.62
(.812) 14.27
(.562) 7.14
(.281) 3.96
(.156)
43-77-8
(case 90,case 199) 18.92
(.745) 13.84
(.545) 5.38
(.212) 3.81
(.150)
43-77-9
(TO-220) 18.42
(.725) 13.21
(.520) 4.32
(.170) 2.92
(.115)
46-77-9
(TO-220) 18.42
(.725) 13.21
(.520) 4.32
(.170) 2.92
(.115)
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Standard Products - Thermalfilm Polyimide Plastic Films
43-77-20
(TO-220,TO-218,TO-3P) 23.24
(.915) 18.80
(.740) 6.98
(.2.75) 3.66
(.144)
For TO-66
Model A B C D Thickness
43-66-2 33.32
(1.312) 19.35
(.762) 3.56
(.140) 1.57
(.062) .05
(.002)
For TO-218
Bulk Thermalfilm™
Part Number Thichness
4300 2 MIL .051 (.002)
4500 5 MIL .127 (.005)
Thermalfilm™ / Thermalfilm™MT
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Standard Products - Thermalfilm Polyimide Plastic Films
Property Electrical -Typical Value @ 25°C Test Method
Thermalfilm™ Thermalfilm™MT
Dielectric Strength
03mm (1 -mil)
275.6 x 103 volts/
mm
(7,000 volts/mil)
177.2 x 103 volts/mm
(4500 volts/mm) ASTM D149-64
Dielectric Constant 3.5 4.3 ASTM D150-64T
Dissipation Factor 0.002 0.002 ASTM D150-64T
Volume Resistivity 1017 ohm-cm 1017 ohm-cm ASTM D257-61
Surface Resistivity 1016 ohms 1016 ohms ASTM D257-61
Corona Start
Voltage .025mm (1 -
mil) 465 volts 465 volts ASTM D1868-
61T
Insulation Resistance 100.00 megohm
mfds. 100.00 megohm mfds.
Based on 0.05
mfd wound
capacitor using
0.25mm (1 -
mil) Film
PHYSICAL
Ultimate Tensile
Strength (MD) 1.72 x 108 Pa
(25,000 psi) 103 MPa (1500 psi) ASTM D882-64T
Bursting Strength
Test (Mullen) 3.10 x 105 Pa (45
psi) 0.31 MPa (45 psi) ASTM 0774-63
Tear Strength - Initial 27,559 gm/mm
(700 gm/mil) 35,433 gm/mm (900
gm/mil) ASTM D1004-61
Density 1.42 gm/cm3
(88.7 lb/ft3)1.78 gm/cm3 (111.1
lb/ft3)ASTM D1505-
63T
Folding Endurance
(MIT) >10,000 cycles >10,000 cycles ASTM D2176-
63T
THERMAL
Melting Point None None
Zero Strength
Temperature 815°C (1499°F) 815°C (1499°F) Hot Bar (Du
Pont Test)
Cut Through
Temperature 435°C (815°F)
525°C (977°F) 435°C (815°F)
525°C (977°F)
Weighted Probe
on Heated Film
(Du Pont Test)
Service Temperature -260°C to 240°C)
(-464°F to 464°F) -260°C to 240°C)
(-464°F to 464°F)
Thermal Conductivity 0.156Wm/K
(.09 BTU/hr-ft-°F) 0.379Wm/K
(.219 BTU/hr-ft-°F)
Model TC-1000
Twin Heatmeter
Comparitive
Tester
Flammability V-0, UL "E" card
E39505 V-0, UL "E" card
E39505 UL 94
Note: One mil equals .001 inch
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