Cookson Group Plaskon® 440 Mineral Filled Novolac Epoxy Molding Compound

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Cookson Group Plaskon® 440 Mineral Filled Novolac Epoxy Molding Compound (discontinued **)
Categories:	Polymer; Thermoset; Epoxy; Epoxy, Molded, Mineral Filled; Filled/Reinforced Thermoset
Material Notes:	Test specimens were transfer molded and post cured 4 hours at 175°C. Combines exceptional reliability with wide molding process latitude. This material is designed to encapsulate semiconductor devices including diodes, transistors, and integrated circuits in dual in-line packages, quad packs, and small outline packages.
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Physical Properties	Metric	English	Comments

Density	1.80 g/cc	0.0650 lb/in³
Spiral Flow	63.0 - 87.0 cm	24.8 - 34.3 in	177°C/1000 psi

Mechanical Properties	Metric	English	Comments
Hardness, Shore D	85	85
Tensile Strength, Ultimate	97.0 MPa	14100 psi
Flexural Strength	147 MPa	21300 psi

Electrical Properties	Metric	English	Comments
Dielectric Constant	3.8 @Frequency 1000 Hz	3.8 @Frequency 1000 Hz
Dielectric Strength	16.0 kV/mm	406 kV/in
Dissipation Factor	0.0060 @Frequency 1000 Hz	0.0060 @Frequency 1000 Hz
Arc Resistance	180 sec	180 sec

Thermal Properties	Metric	English	Comments
CTE, linear	22.0 µm/m-°C @Temperature 20.0 °C	12.2 µin/in-°F @Temperature 68.0 °F
CTE, linear, Transverse to Flow	70.0 µm/m-°C @Temperature 20.0 °C	38.9 µin/in-°F @Temperature 68.0 °F
Thermal Conductivity	0.600 W/m-K	4.16 BTU-in/hr-ft²-°F
Glass Transition Temp, Tg	165 °C	329 °F
Flammability, UL94	V-0 @Thickness 3.20 mm	V-0 @Thickness 0.126 in
	V-0 @Thickness 3.20 mm	V-0 @Thickness 0.126 in

Processing Properties	Metric	English	Comments
Processing Temperature	175 - 185 °C	347 - 365 °F	Molding temperature

**
Materials flagged as discontinued () are no longer part of the manufacturer’s standard product line according to our latest information. These materials may be available by special order, in distribution inventory, or reinstated as an active product. Data sheets from materials that are no longer available remain in MatWeb to assist users in finding replacement materials.

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PCOOK301 / 21397

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