Black FR4 Glass Fiber Sheet for 3D Printing | 1mm-5mm Thickness

Black FR4 G10 Fiberglass Sheet – High-Performance Electrical Insulation Plate for Industrial Use

Unlock reliable electrical insulation and mechanical strength with our Black FR4 G10 Fiberglass Sheet — engineered to meet the high-performance demands of electrical, electronic, and industrial applications. Made from woven fiberglass cloth and epoxy resin, this thermoset laminate offers excellent dielectric strength, flame resistance, and dimensional stability, even under high temperatures.

Whether you're manufacturing switchgear insulation boards, transformer spacers, or heat-resistant support panels, our FR4 G10 sheets provide the precision and performance you can trust.

Engineered for Electrical Insulation and Thermal Stability

• ⚡ High Dielectric Strength: Maintains excellent insulation even in high-voltage environments

• 🔥 Heat Resistance: Performs reliably up to 180°C operating temperature

• 🛠️ Machinable & Durable: Can be cut, drilled, and milled without cracking

• 🧱 High Mechanical Strength: Supports structural loads while maintaining electrical isolation

• 🌑 Matte Black Finish: Low-glare surface perfect for contrast marking and component visibility

Industrial Applications

Trusted across electrical and mechanical sectors, this black FR4 fiberglass sheet is ideal for:

• Switchgear, control panels, and transformer insulation

• PCB mounting and electrical enclosure backplates

• Heat shields and mechanical spacers in industrial machinery

• CNC-machined structural components for electronic devices

• Rail transit, aerospace, and energy systems requiring flame-retardant panels

Product Specifications

Why Choose Our FR4 G10 Insulation Boards?

• 🏭 Professional-Grade Material: Built to meet the standards of electrical and mechanical engineers

• 🔩 CNC Processing Ready: Precision machining available with your drawings or specifications

• 🌍 Global Delivery: Ships worldwide with free standard shipping on all orders

• 🛡️ 30-Day Return Policy: Satisfaction guaranteed on all products

• 🧰 OEM & Bulk Orders Supported: Special pricing and services for high-volume B2B customers

Frequently Asked Questions

Q: Is this sheet flame retardant?
Yes. FR4 material is UL94-V0 rated, making it ideal for flame-critical applications.

Q: Can I request custom cutouts or shapes?
Absolutely. We offer CNC machining services to meet your exact specifications.

Q: What's the difference between FR4 and G10?
Functionally, they are very similar. G10 is the industrial-grade epoxy glass fiber sheet, while FR4 adds flame retardance — this product meets both criteria.

Q: Can this be used for transformer insulation?
Yes. Its electrical insulation, mechanical strength, and heat resistance make it ideal for transformer and switchgear usage.

Trusted by Professionals Worldwide

Our FR4 G10 boards are used by electrical manufacturers, industrial designers, and engineering teams across industries — from power distribution to aerospace. With over 15 years of experience, we provide more than just material — we deliver reliability.

Need Custom Sizes or OEM Support?

👉 Click “Add to Cart” for standard sizes or Contact Us for CNC customization, bulk orders, or technical inquiries.
Let our expert team support your project with precision, speed, and professionalism.