Cosmic Plastics E4920FC Mineral Filled Epoxy Molding Compound

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Cosmic Plastics E4920FC Mineral Filled Epoxy Molding Compound
Categories:	Polymer; Thermoset; Epoxy; Epoxy, Encapsulating, Glass or Mineral Filled
Material Notes:	Cosmic E4920FC is a mineral filled epoxy molding compound which is available either in a granular form, or preformed in a variety of sizes and weights. It has excellent moisture resistance, thermal cycling stability and outstanding moldability. Parts molded from this material do not support fungus growth. It is available in a wide flow range. E4920FC is available in black, gold, green or red. Applications: Encapsulation of passive devices such as capacitors, inductors, diodes and rectifiers. 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 - 5	2 - 5
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	128 MPa	18500 psi
Flexural Modulus	13.8 GPa	2000 ksi
Compressive Strength	241 MPa	35000 psi
Izod Impact, Notched	0.267 J/cm	0.500 ft-lb/in

Electrical Properties	Metric	English	Comments
Volume Resistivity	5.5e+15 ohm-cm	5.5e+15 ohm-cm
Surface Resistance	4.00e+16 ohm	4.00e+16 ohm
Dielectric Constant	3.9 @Frequency 1000 Hz	3.9 @Frequency 1000 Hz	Wet
	4.3 @Frequency 1e+6 Hz	4.3 @Frequency 1e+6 Hz	Wet
Dielectric Strength	15.7 kV/mm	400 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	19.0 µm/m-°C	10.6 µin/in-°F	Alpha 1
	70.0 µm/m-°C	38.9 µin/in-°F	Alpha 2
Thermal Conductivity	0.0837 W/m-K	0.580 BTU-in/hr-ft²-°F
Heat Distortion Temperature	260 °C	500 °F
Glass Transition Temp, Tg	175 °C	347 °F
Flammability, UL94	V-0 @Thickness 1.59 mm	V-0 @Thickness 0.0625 in

Processing Properties	Metric	English	Comments
Mold Temperature	150 - 180 °C	302 - 356 °F
Injection Pressure	2.07 - 6.89 MPa	300 - 1000 psi	Molding
Shelf Life	8.00 Month @Temperature 5.00 °C	8.00 Month @Temperature 41.0 °F

Descriptive Properties
MIL-M-14	MEC		ASTM D5948-05
MIL-M-14	MEE		ASTM D5948-05
	MEG		ASTM D5948-05
	MEH		ASTM D5948-05

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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PCOSM018f / 200215

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