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 +/- 0.38mm(0.015"), hole diameters are +/- 0.25mm (0.010") and angularity is +/- 1 1/2° unless otherwise specified.
For TO-3
| Part Number | RoHS | PCN | A | B | C | D |
| 43-03-1G |  |
N/A | 43.94 (1.730) |
31.75 (1.250) |
3.56 (0.140) |
1.57 (0.062) |
| 43-03-2G | |
 |
42.04 (1.655) |
27.00 (1.063) |
3.96 (0.156) |
1.57 (0.062) |
| 43-03-3G | |
N/A | 42.04 (1.655) |
27.00 (1.063) |
3.96 (0.156) |
4.22 (0.166) |
| 43-03-4G | |
|
39.70 (1.563) |
26.67 (1.050) |
3.56 (0.140) |
1.57 (0.062) |
| 43-03-6G | |
N/A | 42.04 (1.655) |
28.58 (1.125) |
3.96 (0.156) |
1.57 (0.062) |
For TO-5 and TO-18
| Part Number | RoHS | PCN | FIG. | A | B | C |
| 43-05-1G (TO-5) |
|
|
A | 9.91 (0.390) |
5.08 (0.200) |
0.91 (0.036) |
| 43-05-2G (TO-5) |
|
|
B | 9.91 (0.390) |
5.08 (0.200) |
0.91 (0.036) |
| 43-18-1G (TO-18) |
|
|
A | 6.35 (0.250) |
2.54 (0.100) |
0.91 (0.036) |
Washer
| Part Number | RoHS | PCN | Thread | A | B |
| 43-02-4G | |
|
#4 | 6.35 (0.250) |
3.05 (0.120) |
| 43-02-10G | |
|
#10 | 14.27 (0.562) |
5.16 (0.203) |
| 43-02-25G | |
|
1/4" | 20.62 (0.812) |
6.73 (0.265) |
For TO-220, TO-126, Case 77, Case 199, Case 90, TO-218, TO-3P
| Part Number | RoHS | PCN | A | B | C | D |
| 43-77-1G (TO-126,case 77) |
|
|
11.10 (0.437) |
7.92 (0.312) |
3.56 (0.140) |
2.36 (0.093) |
| 43-77-2G (case 90,case 199) |
|
|
17.45 (0.687) |
14.27 (0.562) |
5.54 (0.218) |
3.18 (0.125) |
| 43-77-6G (case 90,case 199) |
|
|
20.62 (0.812) |
14.27 (0.562) |
7.14 (0.281) |
3.96 (0.156) |
| 43-77-8G (case 90,case 199) |
|
|
18.92 (0.745) |
13.84 (0.545) |
5.38 (0.212) |
3.81 (0.150) |
| 43-77-20G (TO-220,TO-218,TO-3P) |
|
|
23.24 (0.915) |
18.80 (0.740) |
6.98 (0.2.75) |
3.66 (0.144) |
For TO-66
| Part Number | A | B | C | D | Thickness |
| 43-66-2 | 33.32 (1.312) |
19.35 (0.762) |
3.56 (0.140) |
1.57 (0.062) |
0.05 (0.002) |
For TO-218
| Part Number | RoHS | PCN | Thickness |
| 43-02-95 | N/A | N/A | 0.05 (0.002) |
Bulk Thermalfilm™
| Part Number | RoHS | PCN | Thickness |
| 4300G 2 MIL | |
|
0.051 (0.002) |
| 4500 5 MIL | N/A | N/A | 0.127 (0.005) |
Thermalfilm™ / Thermalfilm™MT
| 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 (0.09 BTU/hr-ft-°F) |
0.379Wm/K (0.219 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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Thermalfilm MT Resistance Calculator
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