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Hysol GR2820 | Black Epoxy Mold Compound

Harmonization Code : 3907.30.00.90 |   Polyacetals, other polyethers and epoxide resins, in primary forms; polycarbonates, alkyd resins, polyallyl esters and other polyesters, in primary forms : Epoxide resins : Other
Main features
  • For Conductive Polymer Tantalum Solid Capacitors
  • Ultra-low stress
  • Thin Wall Crack Resistance

Product Description

Hysol GR2820 is a black, ultra low stress, semiconductor-grade epoxy molding compound designed for the encapsulation and protection of thin walled conductive polymer tantalum solid capacitors (POSCAP).  In the world of passive components, POSCAPs are relatively new to the scene. These solid electrolytic capacitors have many advantages, but offer challenges for epoxy mold compound manufacturers. After many years of development, the GR2820 has been developed to have excellent thin wall crack resistance - the greatest challenge of molding these devices. Furthermore, it has been optimized for automolding equipment.

Hysol GR2820 is a silica filled(81%) environmentally "green" halogen free product, meaning it doesn't contain any bromine, antimony or phosphorus flame retardants. Previous MG-series EMC dominated the space for tantalum capacitors but used halogen-containing flame retardants. This material is designed to achieve JEDEC Level 1 requirements at 260°C reflow temperature on conductive polymer capacitors. It's fast cure time also ensures that it is compatible with the latest automold manufacturing equipment. Hysol GR2820 meets UL 94 V-0 Flammability at 1/4 inch (6.35mm) thickness.

Product Family
GR2820 Black  
13 mm
5.8 gr

Catalog Product

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Technical Specifications

General Properties
The color
Filler Content 83 %
Specific Gravity
Specific Gravity
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.
Shelf Life
Shelf Life
Shelf life is the amount of time after manufacturing that a product is guaranteed to retain its properties.

It differs vastly per product and it is based on temperature and storage conditions.

The properties can be guaranteed for the temperature and time range indicated on the TDS since those are the ones tested to be the best for the product.
Shelf Life @ -4°C 183 days
Chemical Properties
Ionic Content
Chloride (Cl-)
Chloride (Cl-)
The amount of Chloride (Cl-) ion extracted from the product in parts per million (ppm)
7 ppm
Sodium (Na+)
Sodium (Na+)
The amount of Sodium (Na+) ion extracted from the product in parts per million (ppm)
6.6 ppm
Moisture Absorption
Moisture Absorption
Moisture absorption shows the capacity of a polymer to absorb moisture from its environment.

Absorbed moisture can reduce the glass transition temperature and strength of a polymer and can also result in popcorning, unreliable adhesion or voids in the bond line due to moisture desorption or entrapment.

Moisture absorption should always be mentioned with the test conditions to provide a meaningful frame of reference.
Moisture absorption - 168h @ 85ºC | 85% RH 0.37 %
Mechanical Properties
Water Extract Data
Water Extract Data
Water Extract Data, 20hrs water boil
Conductivity 40 mmhos/cm
Flexural Modulus
Flexural Modulus @ 25°C 14000 N/mm2
Flexural Strength
Flexural Strength @ 25°C
Flexural Strength @ 25°C
Flexural strength, also known as modulus of rupture, or bend strength, or transverse rupture strength is a material property, defined as the stress in a material just before it yields in a flexure test. This is the flexural strength tested at Room Temperature, 25°C
107 N/mm2
Electrical Properties
Volume Resistivity
Volume Resistivity
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.
1.6x1016 Ohms⋅cm
Thermal Properties
Coefficient of Thermal Expansion (CTE)
Coefficient of Thermal Expansion (CTE)
CTE (Coefficient of thermal expansion) is a material property that is indicative of the extent to which a material expands with a change in temperature. This can be a change in length, area or volume, depending on the material.

Knowing the CTE of the layers is helpful in analyzing stresses that might occur when a
system consists of an adhesive plus some other solid component.
Coefficient of Thermal Expansion (CTE), α1
Coefficient of Thermal Expansion (CTE), α1
CTE α1 (alpha 1) is the slope of the Coefficient of thermal expansion in a temperature range below the Glass transition temperature (Tg).

It explains how much a material will expand until it reaches Tg.
12 ppm/°C
Coefficient of Thermal Expansion (CTE), α2
Coefficient of Thermal Expansion (CTE), α2
CTE α2 (alpha 2) is the slope of the Coefficient of thermal expansion in a temperature range above the Glass transition temperature (Tg).

It explains the extent to which a material will expand after it passes Tg.
45 ppm/°C
Gel Time
Gel Time
Gel time is the time it takes for a material to reach such a high viscosity (gel like) that it is no longer workable.

It is usually measured for different temperature conditions and even though it does not refer to full cure it is advisable to never move or manipulate the material after it reached its gel time since it can lose its desired end properties.
Gel Time @ 175°C / 347°F 20 s
Glass Transition Temperature (Tg)
Glass Transition Temperature (Tg)
The glass transition temperature for organic adhesives is a temperature region where the polymers change from glassy and brittle to soft and rubbery. Increasing the temperature further continues the softening process as the viscosity drops too. Temperatures between the glass transition temperature and below the decomposition point of the adhesive are the best region for bonding.

The glass-transition temperature Tg of a material characterizes the range of temperatures over which this glass transition occurs.
183 °C
Spiral Flow
Spiral Flow @ 175°C 66 cm
UL94 Rating
UL94 @ 1/4 inch V0
Curing Conditions
Curing Time
Curing Time @ 175°C / 347°F 90 - 120 s
Mold Temperature 160 - 190 °C
Preheat Temperature 80 - 100 °C
Transfer Pressure 40 - 100 kg/cm2
Transfer Time 6 - 18 s
Post Mold Cure
Post Mold Cure @ 175°C / 347°F 3 - 6 hrs

Additional Information


Short Description of Hysol GR2820 | Black Epoxy Mold Compound

Typical applications and uses of Hysol GR2820 | Black Epoxy Mold Compound include:

  • Condutive Polymer Tantalum Solid Capacitors (POSCAP)
  • Other Tantalum Capacitors

Technical Datasheets for Hysol GR2820 | Black Epoxy Mold Compound

TDS (English) Kapton_Technical_Data_Sheet Click to access Hysol GR2820 | Black Epoxy Mold Compound Technical Data Sheet
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Packaging Details

Packaging Details for Hysol GR2820 | Black Epoxy Mold Compound

The following information is specifically related to each unit of measure of Hysol GR2820 | Black Epoxy Mold Compound. If you which to compare this to other product sizes, click on the respective product from the list above and check here for values specific to that product. These values are taken from our internal database and are used in the calculation of the gross weight and packaging dimensions of the goods during shipping. You can use these values to approximate delivery charges using your own carrier.