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	Original Value	Comments

Specific Gravity	1.85 g/cc
Bulk Factor	2 - 5
Water Absorption	0.25 % @Temperature 50.0 °C, Time 173000 sec
Linear Mold Shrinkage	0.0020 - 0.0040 in/in

Mechanical Properties	Original Value	Comments
Hardness, Barcol	65
Tensile Strength at Break	12000 psi
Flexural Strength	18500 psi
Flexural Modulus	2.00e+6 psi
Compressive Strength	35000 psi
Izod Impact, Notched	0.500 ft-lb/in

Electrical Properties	Original Value	Comments
Volume Resistivity	5.5e+15 ohm-cm
Surface Resistance	4.00e+16 ohm
Dielectric Constant	3.9 @Frequency 1000 Hz	Wet
	4.3 @Frequency 1e+6 Hz	Wet
Dielectric Strength	400 V/mil	Wet, step by step
Dielectric Breakdown	56 V	Wet, step by step
Dissipation Factor	0.011 @Frequency 1e+6 Hz	Wet
	0.012 @Frequency 1000 Hz	Wet
Arc Resistance	180 sec

Thermal Properties	Original Value	Comments
CTE, linear	19.0 µm/m-°C	Alpha 1
	70.0 µm/m-°C	Alpha 2
Thermal Conductivity	0.000200 cal cm/sec-cm²-°C
Heat Distortion Temperature	260 °C
Glass Transition Temp, Tg	175 °C
Flammability, UL94	V-0 @Thickness 1.59 mm

Processing Properties	Original Value	Comments
Mold Temperature	150 - 180 °C
Injection Pressure	300 - 1000 psi	Molding
Shelf Life	8.00 Month @Temperature 5.00 °C

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

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PCOSM018f / 200215

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