Cosmic Epoxy E4930R

Chemical Family: Epoxy & Epoxy Derivatives

Cosmic Epoxy E4930R is a mineral-filled epoxy molding compound supplied in granular form. It is designed for encapsulating various electronic components, including optocouplers, capacitors, resistors, resistor networks, transistors, SOICs (Small Outline Integrated Circuits), and QFPs (Quad Flat Packages). This material helps protect and insulate these components, ensuring their proper functioning in electronic applications.

Properties

Physical Form: Granules
Solid

Product families

Plastics — Thermoset Resins

Epoxies

Other characteristics

Brand: Cosmic Epoxy
End Uses: Capacitors, Encapsulant, Optocoupler, Resistor, Transistor
Polymer Name: Epoxy Resins & Compounds
Flexural Strength: 103.35 - 103.35 MPa
Volume Resistivity: 10000000000000.0 - 10000000000000.0 Ohm-m
Markets: Electrical & Electronics
Flame Rating: UL 94 V0
Key Features: It has excellent moisture resistance and thermal cycling stability.; Standard spiral flow range is 30-40" (EMMI) at 160 0C 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 160 0C.
Technology: Plastics
Fillers Included: Mineral
Material Features: Excellent Moisture Resistance
Good Thermal Stability
Low Odor
Applications: Used to encapsulate optocouplers, capacitors, resistors, resistor networks, transistors, SOIS's and QFP.
Certifications and Compliance: ISO 9001
UL 94
Plastics and Elastomers End Uses: Capacitors
Encapsulant
Optocoupler
Resistor
Transistor
Plastics and Elastomers Functions: Resin

Technical data

Table 1 of 5

6 rows

Characteristic	Value	Unit
Flexural Strength	15000	psi
Flexural Modulus	2.0 x 10⁶	psi
Compressive Strength	28000	psi
Tensile Strength	12000	psi
Impact Strength (Izod Notched)	0.6	ft-lb / inch
Barcol Hardness	65	—

Table 2 of 5

5 rows

Characteristic	Value	Unit
Heat Deflection Temperature	260	°C
Glass Transition Temperature (Tg)	165	°C
Coefficient of Linear Expansion (Alpha 1)	25 x 10⁻⁶	°C
Coefficient of Linear Expansion (Alpha 2)	80 x 10⁻⁶	°C
Thermal Conductivity	30 x 10⁻⁴	cal/sec/cm²/°C/cm

Table 3 of 5

9 rows

Characteristic	Value	Unit
Arc Resistance	180	seconds
Volume Resistance	1 x 10¹⁵	Ohm - cm
Surface Resistance	1 x 10¹⁵	Ohm - cm
Dielectric Strength (Kv Step-by-Step, Wet)	350	volts/mil
Dielectric Breakdown (Step-by-Step, Wet)	56	Kv
Dielectric Constant (at 1 KHz, Wet)	4.2	—
Dissipation Factor (at 1KHz, Wet)	0.012	—
Dielectric Constant (at 1 MHz, Wet)	4.5	—
Dissipation Factor (at 1MHz, Wet)	0.011	—

Table 4 of 5

1 row

Characteristic	Value	Unit
Water Absorption (at 50 °C,48 hours)	0.25	%

Table 5 of 5