COOLTHERM EP-301
Harmonization Code : 3910.00.00.90 | Silicones in Primary Forms; Others
Main features
- 1.3 W/(m K) Thermal Encapsulation
- High-Fluidity Intricate-Circuitry Potting
- 19.7 kV/mm Dielectric Strength
Product Description
CoolTherm® EP-301 AD Epoxy Resin is a general-purpose, thermally conductive epoxy resin formulated for use with CoolTherm® EP-6010 Hardener. The two-component system combines high fluidity and air-release characteristics with a typical cured thermal conductivity of 1.3 W/m·K, supporting the potting of intricate circuitry and encapsulation of power devices. Available as a black or white liquid, the resin has a typical viscosity of 10,350 cP at 25 °C. When mixed with EP-6010 Hardener at 100:5.3 by weight, it cures to a rigid, electrically insulating material with dimensional stability from -65 to 155 °C.
Key features
- Thermally conductive encapsulation: Provides a typical cured thermal conductivity of 1.3 W/m·K when used with CoolTherm EP-6010 Hardener.
- High-fluidity epoxy system: Supports air release and material flow when potting intricate circuitry or encapsulating power devices.
- Electrical and temperature performance: Provides a typical dielectric strength of 19.7 kV/mm and dimensional stability from -65 to 155 °C.
Applications / Suitable for
- Potting intricate circuitry
- Encapsulating power devices
- Thermally conductive epoxy castings up to 200 g
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Appearance
Black or White Liquid
Appearance at room temperature.
Specific Gravity
1.88
Specific gravity (SG) is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume.
For liquids, the reference substance is almost always water (1), while for gases, it is air (1.18) at room temperature. Specific gravity is unitless.
Physical Properties
Viscosity
10350 mPa.s
Viscosity is a measurement of a fluid’s resistance to flow.
Viscosity is commonly measured in centiPoise (cP). One cP is defined as
the viscosity of water and all other viscosities are derived from this base. MPa is another common unit with a 1:1 conversion to cP.
A product like honey would have a much higher viscosity -around 10,000 cPs-
compared to water. As a result, honey would flow much slower out of a tipped glass than
water would.
The viscosity of a material can be decreased with an increase in temperature in
order to better suit an application
Electrical Properties
Dielectric Strength
19.7 kV/mm
Dielectric strength is measured in kV per mm and is calculated by the Breakdown voltage divided by the thickness of the tested material.
Those two properties go hand in hand and while Breakdown voltage is always thickness dependent, dielectric strength is a general material property.
As an example, the dielectric strength of Polyimide is 236 kV/mm. If we place 1mm of Polyimide between two electrodes, it will act as an insulator until the voltage between the electrodes reaches 236 kV. At this point it will start acting as a good conductor, causing sparks, potential punctures and current flow.
Volume Resistivity
1 x 10^15 Ohms⋅cm
Volume resistivity, also called volume resistance, bulk resistance or bulk resistivity is a thickness dependent measurement of the resistivity of a material perpendicular to the plane of the surface.
Thermal Properties
Thermal Conductivity
1.3 W/m.K
Thermal conductivity describes the ability of a material to conduct heat. It is required by power packages in order to dissipate heat and maintain stable electrical performance.
Thermal conductivity units are [W/(m K)] in the SI system and [Btu/(hr ft °F)] in the Imperial system.
Mechanical Properties
Elongation
at Break 1.7 %
Elongation is the process of lengthening something.
It is a percentage that measures the initial, unstressed, length compared to the length of the material right before it breaks.
It is commonly referred to as Ultimate Elongation or Tensile Elongation at break.
Chemical Properties
Moisture absorption
10 days @25°C 0.2 %
Additional Information
Technical properties
As-supplied / before-processing properties
Typical properties of CoolTherm EP-301 AD resin and the mixed EP-301 AD/EP-6010 system before cure. Values are not intended for specification purposes.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Appearance | Black or white liquid | — | CoolTherm EP-301 AD resin |
| Viscosity | 10,350 | cP | Resin at 25 °C; test method not stated |
| Specific gravity | 1.88 | — | Resin at 25 °C |
| Mix ratio | 100:5.3 | By weight | EP-301 AD resin : EP-6010 hardener |
| Working life | 2 | hours | Mixed system at 25 °C |
| Cure time | 24 or 2 | hours | 24 hours at 25 °C or 2 hours at 65 °C after the material reaches the target temperature |
| Shelf life | 1 | year | From date of manufacture when stored at 25 °C in the original, unopened container |
Technical properties
After-processing / final-state properties
Typical properties of the EP-301 AD and EP-6010 system after curing for 2 hours at 65 °C followed by 2 hours at 100 °C. Values are not intended for specification purposes.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Thermal conductivity | 1.3 | W/m·K | Cured bulk material; test method not stated |
| Dimensional-stability temperature range | -65 to 155 | °C | Documented dimensional-stability range; retained individual properties are not stated |
| Hardness | 87 | Shore D | Test method not stated |
| Tensile strength | 68 (9,890) | MPa (psi) | At 25 °C; test method not stated |
| Coefficient of linear thermal expansion | 26 | ppm/°C | Temperature region and test method not stated |
| Volume resistivity | 1 × 1015 | ohm-cm | At 25 °C; test method not stated |
| Dielectric strength | 19.7 (500) | kV/mm (V/mil) | Specimen thickness and test method not stated |
| Moisture absorption | 0.2 | % | After 10 days at 25 °C; exposure medium and test method not stated |
