FR4

FR4 is a high-grade, flame-retardant epoxy laminate material reinforced with woven glass fiber cloth. It is one of the most widely used insulating materials in the electronics, electrical, and industrial sectors, thanks to its outstanding strength, dimensional stability, and insulation properties.

The “FR” stands for Flame Retardant, indicating its compliance with UL94 V-0 standards, ensuring it self-extinguishes when exposed to fire. Its combination of lightweight structure, high mechanical strength, low water absorption, and excellent dielectric properties makes FR4 the preferred choice for printed circuit boards (PCBs) and a wide variety of high-performance applications.

At GD Prototyping, we offer FR4 materials with consistent quality for electronic devices, electrical insulation, mechanical supports, and precision prototypes. With its heat resistance, electrical insulation, and machinability, FR4 remains a versatile and trusted engineering material across industries.

Applications

• Printed circuit boards (PCBs)
• Electrical insulation plates and panels
• Switchgear and transformer components
• High-voltage electrical equipment
• Structural and support components in electronics
• Industrial jigs and fixtures

Benefits of FR4 Materials

• Flame Retardant: Meets UL94 V-0 standard, ensuring fire safety.
• Excellent Electrical Insulation: Superior dielectric strength for electronic applications.
• High Mechanical Strength: Withstands stress, pressure, and impact.
• Heat Resistance: Performs reliably under high operating temperatures.
• Moisture Resistance: Low water absorption, stable in humid environments.
• Dimensional Stability: Maintains shape and integrity under load.
• Versatility: Suitable for machining into complex shapes and custom components.