FR-4 - Glass Epoxy

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Key Characteristics of FR4

FR-4 is a widely used thermoset composite material composed of woven fiberglass cloth laminated with an epoxy resin. 

 

The material is recognized for its excellent electrical insulation properties, making it a preferred choice for various electrical and electronic applications.

 

FR-4 exhibits high mechanical strength, which ensures durability and reliability in demanding conditions. This material offers good thermal stability, withstanding temperatures up to 130°C (266°F).

 

FR-4 is also characterized by its low moisture absorption, which contributes to its dimensional stability and performance in humid environments.

Additionally, it possesses flame retardant properties, earning its designation "FR" (flame resistant), making it suitable for applications where fire safety is a concern.

How It's Used: Applications of FR-4:

Explore how this composite material is used across industries:

 

Printed Circuit Boards (PCBs): FR4 is the standard material used in the manufacturing of PCBs, providing a stable substrate for electronic components.

 

Electrical Insulation: Due to its excellent dielectric strength, FR-4 is widely used as an insulator in electrical devices, ensuring safe operation.

 

Encapsulation and Housing: Its mechanical strength and flame-retardant properties make it ideal for encapsulating sensitive electronic components and housing.

 

Industrial Equipment: FR-4 is frequently used in industrial machinery for electrical insulation and structural components that require durability.

 

Aerospace Components: The material's lightweight nature, combined with its mechanical properties, makes it suitable for use in aerospace applications where weight savings are critical.

 

Automotive Electronics: FR-4 is utilized in various automotive electronic components, providing insulation and structural support in harsh environments.

Technical Specifications for FR4

Explore the mechanical and structural properties of Ready Plastic FR4

Military/Fed Spec: Mil-1-24768/27 Type GEE-F
Specific Gravity: 1.85
Tensile Strength (psi): 38,000
Comp. Strength: 66,000
Flexural Strength (psi): 60,000
Hardness, M Scale: 115
Bond Strength: 2,300
Shear Strength (psi): 21,500

Dissipation Factor, 10 cycles, Cond A: 0.022
Dielectric Constant 10 cycles, Cond A: 4.80
Electric Strength V/MIL Cond A: 800
Flammability Rating: 94HB
Max. Oper. Temp C/F: 140/284
Coeff. Thermal Exp. IN/IN/C x 10-5: 1.00
Water Absorption %-24 hrs: 0.10
Izod Impact Strength (ft/lb/in) @ 49 C: 14.00