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FR4
Material type: Plastic
FR-4 glass epoxy is a popular and versatile high-pressure thermoset plastic laminate grade with good strength to weight ratios. With near zero water absorption, FR-4 is most commonly used as an electrical insulator possessing considerable mechanical strength. The material is known to retain its high mechanical values and electrical insulating qualities in both dry and humid conditions.
Process compatibility
Material Color
Green
Yellow
Black
Material advantages
It has excellent electrical performance, high working temperature, and its performance is less affected by the environment.
Material shortcomings
-
Recommended description
These attributes, along with good fabrication characteristics, lend utility to this grade for a wide variety of electrical and mechanical applications.
Properties
| Name | |
|---|---|
| Tensile strength | 415 MPa |
| Rockwell hardness | 110 M scale |
| Temperature index | 140 °C |
| Water absorption | −0.125 in < 0.10% |
| Specific gravity/density | 1.850 g/cm3 |
| Dielectric breakdown (A) | > 50 kV |
| Young's modulus – LW | 24 GPa |
| Thermal conductivity | 0.29 - 0.34 W/(m⋅°C) |
Common applications
• Automotive applications
• Electrical applications
• PCBs
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