Cosmic Plastics E4930R Mineral Filled Epoxy Molding Compound

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Cosmic Plastics E4930R Mineral Filled Epoxy Molding Compound
Categories:	Polymer; Thermoset; Epoxy; Epoxy, Encapsulating, Glass or Mineral Filled
Material Notes:	Description: Cosmic E4930R is a mineral filled, application specific epoxy molding compound which is supplied in a granular form. Features: It has excellent moisture resistance and thermal cycling stability. Standard spiral flow range is 30-40” (EMMI) at 1600C and 1000 psi, and a flow duration of 40-50 seconds at 325 - 1000 psi. It has a hot plate gel time of 35-45 seconds at 1600C. Applications: Used to encapsulate optocouplers, capacitors, resistors, resistor networks, transistors, SOIS’s and QFP. Information provided by Cosmic Plastics Inc
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Physical Properties	Metric	English	Comments

Specific Gravity	1.85 g/cc	1.85 g/cc
Bulk Factor	2.0 - 5.0	2.0 - 5.0
Water Absorption	0.25 % @Temperature 50.0 °C, Time 173000 sec	0.25 % @Temperature 122 °F, Time 48.0 hour
Linear Mold Shrinkage	0.0020 - 0.0040 cm/cm	0.0020 - 0.0040 in/in

Mechanical Properties	Metric	English	Comments
Hardness, Barcol	65	65
Tensile Strength at Break	82.7 MPa	12000 psi
Flexural Strength	103 MPa	15000 psi
Flexural Modulus	13.8 GPa	2000 ksi
Compressive Strength	193 MPa	28000 psi
Izod Impact, Notched	0.320 J/cm	0.600 ft-lb/in

Electrical Properties	Metric	English	Comments
Volume Resistivity	1.00e+15 ohm-cm	1.00e+15 ohm-cm
Surface Resistance	1.00e+15 ohm	1.00e+15 ohm
Dielectric Constant	4.2 @Frequency 1000 Hz	4.2 @Frequency 1000 Hz	Wet
	4.5 @Frequency 1e+6 Hz	4.5 @Frequency 1e+6 Hz	Wet
Dielectric Strength	13.8 kV/mm	350 kV/in	Wet, step by step
Dielectric Breakdown	56 V	56 V	Wet, step by step
Dissipation Factor	0.011 @Frequency 1e+6 Hz	0.011 @Frequency 1e+6 Hz	Wet
	0.012 @Frequency 1000 Hz	0.012 @Frequency 1000 Hz	Wet
Arc Resistance	180 sec	180 sec

Thermal Properties	Metric	English	Comments
CTE, linear	25.0 µm/m-°C	13.9 µin/in-°F	Alpha 1
	80.0 µm/m-°C	44.4 µin/in-°F	Alpha 2
Thermal Conductivity	1.26 W/m-K	8.70 BTU-in/hr-ft²-°F
Heat Distortion Temperature	260 °C	500 °F
Glass Transition Temp, Tg	165 °C	329 °F
Flammability, UL94	V-0 @Thickness 3.17 mm	V-0 @Thickness 0.125 in

Processing Properties	Metric	English	Comments
Mold Temperature	150 - 180 °C	302 - 356 °F

Descriptive Properties
Molding Pressure	500-8000 psi

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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