FR4 Epoxy Fiberglass Sheet 3240 Board for PCB & CNC | 5–50mm Thick
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- Thickness x W x L mm / 5x200x300mm 1Pcs - $31.60
- Thickness x W x L mm / 6x200x300mm 1Pcs - $38.36
- Thickness x W x L mm / 8x200x300mm 1Pcs - $48.29
- Thickness x W x L mm / 10x200x300mm 1Pcs - $59.95
- Thickness x W x L mm / 12x200x300mm 1Pcs - $71.60
- Thickness x W x L mm / 15x200x300mm 1Pcs - $89.62
- Thickness x W x L mm / 5x200x250mm 1Pcs - $25.86
- Thickness x W x L mm / 6x200x250mm 1Pcs - $27.41
- Thickness x W x L mm / 8x200x250mm 1Pcs - $35.58
- Thickness x W x L mm / 10x200x250mm 1Pcs - $44.54
- Thickness x W x L mm / 12x200x250mm 1Pcs - $53.11
- Thickness x W x L mm / 15x200x250mm 1Pcs - $65.36
- Thickness x W x L mm / 5x300x400mm 1Pcs - $56.89
- Thickness x W x L mm / 6x300x400mm 1Pcs - $66.82
- Thickness x W x L mm / 5x300x300mm 1Pcs - $38.70
- Thickness x W x L mm / 6x300x300mm 1Pcs - $46.09
- Thickness x W x L mm / 8x300x300mm 1Pcs - $61.63
- Thickness x W x L mm / 10x300x300mm 1Pcs - $76.77
- Thickness x W x L mm / 5x100x100mm 1Pcs - $24.49
- Thickness x W x L mm / 6x100x100mm 1Pcs - $25.15
- Thickness x W x L mm / 8x100x100mm 1Pcs - $23.13
- Thickness x W x L mm / 10x100x100mm 1Pcs - $25.69
- Thickness x W x L mm / 12x100x100mm 1Pcs - $27.89
- Thickness x W x L mm / 15x100x100mm 1Pcs - $29.98
- Thickness x W x L mm / 20x100x100mm 1Pcs - $30.25
- Thickness x W x L mm / 25x100x100mm 1Pcs - $33.54
- Thickness x W x L mm / 30x100x100mm 1Pcs - $36.82
- Thickness x W x L mm / 35x100x100mm 1Pcs - $39.12
- Thickness x W x L mm / 40x100x100mm 1Pcs - $43.58
- Thickness x W x L mm / 45x100x100mm 1Pcs - $48.88
- Thickness x W x L mm / 50x100x100mm 1Pcs - $53.95
- Thickness x W x L mm / 5x200x200mm 1Pcs - $25.25
- Thickness x W x L mm / 6x200x200mm 1Pcs - $26.48
- Thickness x W x L mm / 8x200x200mm 1Pcs - $28.19
- Thickness x W x L mm / 10x200x200mm 1Pcs - $34.61
- Thickness x W x L mm / 12x200x200mm 1Pcs - $41.61
- Thickness x W x L mm / 15x200x200mm 1Pcs - $51.53
FR4 Epoxy Fiberglass Sheet 3240 Board for PCB & CNC | 5–50mm Thick
PRODUCT DETAILS
FR4 Epoxy Fiberglass Sheet – CNC Machinable High-Temperature Insulation Board
Durable 3240 FR4 Epoxy Board for PCB, Electrical Insulation, and CNC Applications
Looking for a robust, heat-resistant fiberglass plate that’s ideal for both industrial manufacturing and DIY electrical projects? Our FR4 Epoxy Fiberglass Sheets meet the 3240 standard and are built to deliver excellent electrical insulation, thermal resistance, and machinability. Available in a wide range of thicknesses from 5mm to 50mm and sizes from 100×100mm to 300×400mm (approx. 3.94" to 11.81"), they’re perfect for PCB insulation, electrical housings, laser cutting, and CNC fabrication.
Key Features and Benefits of FR4 Fiberglass Sheets
High Mechanical and Dielectric Strength
Made from flame-retardant epoxy resin and woven fiberglass, this board ensures strong insulation even under high-voltage conditions. It’s widely used in high-frequency circuit boards, transformers, and electric panels.
CNC Machinable for Custom Applications
The sheet can be easily milled, drilled, and laser cut, making it ideal for custom insulator shapes, PCB prototyping, and gasket fabrication. Smooth cutting performance with minimal burring and no carbonization.
Excellent Heat and Moisture Resistance
Withstands a wide temperature range and resists moisture penetration – making it suitable for outdoor enclosures, chemical-resistant bases, and industrial control systems.
Available Sizes and Thicknesses (mm/inch)
All dimensions are Thickness × Width × Length
| Size (mm) | Size (inches, approx.) |
|---|---|
| 100×100mm | 3.94" × 3.94" |
| 200×200mm | 7.87" × 7.87" |
| 200×250mm | 7.87" × 9.84" |
| 200×300mm | 7.87" × 11.81" |
| 300×300mm | 11.81" × 11.81" |
| 300×400mm | 11.81" × 15.75" |
Available Thicknesses:
5mm (0.2") / 6mm / 8mm / 10mm / 12mm / 15mm / 20mm / 25mm / 30mm / 35mm / 40mm / 45mm / 50mm (2.0")
📌 Custom sizes, thicknesses, and pre-cut shapes are available upon request.
Ideal Applications for FR4 Epoxy Glass Fiber Board
-
Printed Circuit Boards (PCBs) – Excellent for prototyping and multilayer circuit insulation
-
CNC Machined Electrical Parts – Switchboards, junction boxes, motor housings
-
Transformer and Inductor Baseboards – Heat-resistant and low-loss dielectric performance
-
Chemical Processing Equipment – Moisture and chemical resistance
-
Mechanical Spacer Plates – Sound-insulating and non-conductive
-
Automotive and Aerospace Parts – High load-bearing and anti-vibration performance
Technical Performance Data
| Property | Value |
|---|---|
| Material | FR4 (Epoxy + Woven Fiberglass) |
| Dielectric Strength | ≥ 14.2 kV/mm |
| Heat Resistance | Up to 155°C (311°F) |
| Flame Retardancy | UL94-V0 |
| Density | ~1.85 g/cm³ |
| Moisture Absorption | <0.3% |
| Machinability | Excellent (CNC/Laser/Drill) |
Why Choose BeePlastic for Your FR4 Sheet Needs?
One-Stop Plastic Solution Provider
With over 15 years of experience in plastics manufacturing and machining, we deliver end-to-end support for engineers, manufacturers, and designers.
Precision Custom Processing
We provide laser cutting, CNC milling, engraving, and other finishing processes to meet your specifications.
Lower Cost, Higher Value
We help you reduce cost per part with optimized sizing, bulk pricing, and efficient international logistics.
Trusted by Global Clients
Shipped to 30+ countries with consistently high customer satisfaction and repeat purchase rates.
🛒 Ready to Buy?
Explore our ready-to-ship sizes above and select the thickness and dimension that match your project needs.
👉 [Add to Cart – Standard Size]
✨ Need a Custom FR4 Epoxy Sheet?
Whether you require a special thickness, a non-standard shape, or custom machining, we can help.
Send us your design or request a quote today!
👉 [Contact Us for Custom Orders & Quotes]
Frequently Asked Questions (FAQ)
Q: Can I use this for high-voltage PCB prototypes?
Yes. Our FR4 board conforms to 3240 insulation standards and is widely used in both prototype and commercial PCB applications.
Q: Do you offer CNC-cut or laser-cut services?
Absolutely. We offer custom CNC machining and laser cutting to any shape or hole pattern you require.
Q: Are small-quantity orders or samples available?
Yes. We support both small batch orders and sample shipments for testing and prototyping.
Q: Can you provide RoHS or REACH certifications?
Yes. Certification documentation can be provided for B2B or compliance purposes – just let us know when requesting a quote.
Note for International Buyers
-
Manual measurement tolerance: ±1–5mm
-
Color may vary slightly due to lighting or screen differences
-
Customs or import duties may apply depending on your region
Unlock Premium Insulation Performance with FR4 Epoxy Sheets Today
Don't settle for subpar materials. Choose BeePlastic’s high-quality FR4 fiberglass epoxy boards and enjoy precision engineering, thermal stability, and top-tier service. Whether you're a prototyping engineer, an industrial manufacturer, or a creative DIYer – we’ve got you covered.
👉 Order now or request your custom quote – we ship worldwide!
REVIEWS
SHIPPING & RETURNS
Shipping Information
Free Standard Shipping
We offer free standard shipping on all orders. Delivery time is approximately 10-25 business days, depending on your location and carrier performance. Tracking information will be provided once your order is shipped.
Express Shipping Available
Need your order faster? We offer express shipping with delivery in 4-7 business days. Express shipping fees are calculated based on your specific shipping address. To arrange express shipping, please contact our customer service team at beeplastic@beeplastic.com or via WhatsApp before placing your order. Our team will confirm the express shipping cost and process your request.
Processing Time
Standard items: Ships within 1-3 business days
Custom items: Requires 7-10 days production time before shipping
Returns & Refunds Policy
Important Notice: Returns are accepted ONLY for products with quality defects. Non-defective items cannot be returned or refunded.
Standard Items (Non-Customized Products)
Standard items without quality defects are not eligible for return or refund. If you receive a standard item with manufacturing defects or quality issues, you may request a return or replacement within 30 days of receipt.
Custom Items (Made-to-Order Products)
All customized products are NON-RETURNABLE and NON-REFUNDABLE under any circumstances. This includes any items manufactured according to your specific dimensions, shapes, quantities, or specifications. Please carefully verify your requirements before placing a custom order.
Quality Defects - How to Report
If you receive a product with quality defects, please contact us within 7 days of receipt at beeplastic@beeplastic.com. Include your order number, clear photos or videos showing the defect, and a description of the problem. Our quality team will review your case within 24 hours and provide a solution (replacement or refund) if the defect is confirmed.
Damaged During Shipping
Please inspect your order immediately upon delivery. If items are damaged during transit, contact us within 48 hours with photos of the damaged items and packaging. We will arrange a free replacement or full refund at no cost to you.
Non-Returnable Items
The following items cannot be returned: All custom-made products, items without quality defects, products damaged due to improper use or storage, and items returned without prior authorization from our team.
Refund Process
For approved returns, refunds will be processed within 10-15 business days after we receive and inspect the returned item. Refunds will be credited to your original payment method. Please allow an additional 5-7 business days for your bank or credit card company to process the refund. You will receive email confirmation once the refund is issued.
EU 14-Day Cooling-Off Period
For non-customized items shipped to EU countries, you have the right to cancel within 14 days of receipt under EU consumer protection laws. However, this right applies only to items with quality defects. Custom-made items remain non-returnable under all circumstances, as permitted by EU regulations for personalized goods.
Contact Us
For any questions about shipping or returns, please contact our customer service team:
Email: beeplastic@beeplastic.com
Response Time: Within 12 hours
We are committed to ensuring your satisfaction and will work with you to resolve any issues promptly and professionally.
CUSTOM FABRICATION
Can't Find the Right Size or Specification?
If our standard products don't match your requirements, we offer comprehensive custom fabrication services. Whether you need a specific dimension, unique shape, different thickness, or special material grade - we can manufacture it to your exact specifications.
Our Custom Capabilities
Precision Machining:
CNC machining, laser cutting, drilling, milling, and turning with ±0.03mm tolerance. Suitable for complex geometries and tight specifications.
Size Range:
Thickness: 0.5mm - 300mm
Maximum dimensions: 2000mm × 3000mm
Custom shapes: Round, square, rectangular, irregular profiles, holes, cutouts, and complex contours
Available Materials:
HDPE, PTFE, POM, Nylon, PEEK, ABS, PC, PMMA, PP, PVC, and more. Food-grade, conductive, anti-static, and flame-retardant options available.
Processing Methods:
CNC machining, laser cutting, injection molding, thermoforming, welding, and bonding. Multiple finishing options including polishing, sandblasting, and color matching.
Why Choose Custom Fabrication?
Perfect Fit: Parts manufactured to your exact specifications eliminate the need for modifications or adaptations.
No Minimum Order: Whether you need 1 piece for testing or 10,000 pieces for production, we accommodate all order sizes.
Cost Savings on Volume: Bulk custom orders receive 15-30% discount compared to purchasing multiple standard items.
Expert Technical Support: Our engineering team provides free consultation on material selection and design optimization.
Custom Order Process
Step 1: Contact us with your requirements - dimensions, material preferences, quantity, and application details. Technical drawings (PDF, CAD, DWG) are helpful but not required.
Step 2: Receive a detailed quotation within 24 hours including pricing, production lead time, and technical recommendations.
Step 3: Approve the quote and specifications. For complex projects, we can provide samples for testing before full production.
Step 4: Production begins. Typical lead time is 7-15 days depending on complexity and quantity.
Step 5: Quality inspection and shipping. Every custom piece undergoes strict dimensional checks before delivery.
Industries We Serve
Automotive components, food processing equipment, medical devices, laboratory instruments, packaging machinery, semiconductor equipment, industrial automation, and more.
Get Your Custom Quote Today
Don't see the exact size or specification you need? Let us manufacture it for you.
Contact us: beeplastic@beeplastic.com
Response time: Quote within 24 hours
What to include: Material type, dimensions, quantity, and intended application. If you have technical drawings, please attach them. If not, simply describe what you need and our team will assist you.
Not sure about material selection or specifications? No problem - our technical team will guide you through the process and recommend the best solution for your application.
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