FR4/G10 Electrical Insulation Fiberglass Sheet, Cut-to-Size (0.5–5 mm)

FR4 G10 Fiberglass Epoxy Sheet – Light Green Insulation Board for CNC Machining & Electrical Applications

High-Performance Electrical Insulation Material

Our FR4 G10 fiberglass epoxy sheet (also known as 3240 epoxy resin board) is a light green, high-strength insulation material widely used in PCB support, transformers, switchgear, CNC machining jigs, and 3D printer platforms. With excellent dielectric strength, mechanical durability, and heat resistance, this epoxy laminate sheet is the trusted choice for both industrial and electrical applications.

📐 Available Sizes and Thickness (Metric & Inch)

• Standard Sizes (mm / inch):

  • 100 × 100 mm (3.94 × 3.94 in)

  • 150 × 150 mm (5.91 × 5.91 in)

  • 200 × 200 mm (7.87 × 7.87 in)

  • 250 × 250 mm (9.84 × 9.84 in)

  • 300 × 300 mm (11.81 × 11.81 in)

  • 350 × 350 mm (13.78 × 13.78 in)

  • 400 × 400 mm (15.75 × 15.75 in)

  • 500 × 300 mm (19.69 × 11.81 in)

• Thickness Options:
  0.5 mm (0.02 in), 1 mm (0.04 in), 1.5 mm (0.06 in), 2 mm (0.08 in), 3 mm (0.12 in), 4 mm (0.16 in), 5 mm (0.20 in)

👉 Custom cut-to-size fiberglass boards are available – simply upload your drawing or contact us for tailored dimensions.

⚡ Key Features and Benefits (FAB Approach)

• Electrical Insulation – High dielectric strength (16–20 kV/mm), ensuring safety and performance in switchgear, transformers, and PCB insulation boards.

• Mechanical Durability – Strong, rigid, and resistant to bending or cracking, ideal for CNC machined components and structural parts.

• Heat Resistance – Continuous working temperature up to 155°C (311°F), short-term resistance up to 180°C (356°F).

• Moisture & Chemical Resistance – Stable in humid or corrosive environments, suitable for industrial machinery and chemical equipment.

• Easy Processing – Compatible with CNC cutting, laser machining, drilling, engraving, and milling.

• Eco-Friendly & Cost-Saving – Long lifespan reduces replacement frequency, lowering total project costs.

🌟 Why Choose Custominsul (Our UVP)

• Wide selection of plastic materials – FR4/G10, PTFE, PEEK, PEI, PI, and more.

• Custom machining service – Cut-to-size, CNC milling, drilling, engraving, UV printing.

• Professional engineering support – Over 15 years of experience in plastics processing.

• Save your costs – Efficient cutting plans, bulk supply options, and free standard shipping.

• Customer-first service – Fast response, personalized solutions, and reliable after-sales support.

🔧 Typical Applications of FR4 G10 Fiberglass Sheets

• PCB support plates & drilling jigs

• Transformer & motor insulation parts

• High-temperature 3D printer platforms

• CNC machined spacers, gaskets, and washers

• Electrical cabinets and switchgear insulation

• Industrial machinery & structural components

❓ Frequently Asked Questions (FAQ)

Q1: What is the maximum operating temperature?
👉 Continuous use up to 155°C (311°F), short-term peaks up to 180°C (356°F).

Q2: Can you cut the FR4 G10 sheet to my required size?
👉 Yes, we offer cut-to-size and CNC machining services – upload your drawing for a precise quote.

Q3: Is this material flame retardant?
👉 Yes, FR4 is known for its UL94 V0 flame-retardant rating, making it safe for electrical insulation.

Q4: How fast can you deliver?
👉 Standard lead time is 3–7 working days. Expedited air shipping takes 3–7 days after production, depending on destination.

🚀 Call to Action – Order or Customize Now

• ✅ [Add to Cart – Standard Sizes Available]

• 🛠️ [Request a Custom Quote – Upload Drawing for CNC Cut Parts]

• 📩 [Contact Our Engineering Team] for technical support and material selection advice

👉 Whether you need standard FR4 fiberglass insulation boards or custom-machined epoxy sheets, Custominsul provides cost-effective, high-quality solutions tailored to your project needs.