EN 
KR 
ES 
AR 
G10 Epoxy Glass Laminate Sheet is a high-performance composite laminate manufactured by impregnating electrical-grade woven fiberglass cloth with epoxy resin, followed by hot pressing under high temperature and high pressure. It offers an excellent combination of mechanical strength, electrical insulation, dimensional stability, and moisture resistance, making it one of the most widely used electrical insulation materials in industrial applications.
G10 complies with internationally recognized standards such as:
NEMA LI-1 Grade G10
MIL-I-24768/2 GEE
IEC 60893 EPGC201
One important distinction is that standard G10 is non-flame-retardant (UL94 HB). It is often confused with FR-4, which has similar mechanical and electrical properties but contains flame-retardant additives and meets the UL94 V-0 flammability rating.
| Property | Unit | Value |
|---|---|---|
| Product Grade | NEMA G10 / IEC EPGC201 | |
| Density | g/cm³ | 1.95–2.10 |
| Flammability | UL94 HB | |
| Water Absorption (5mm) | % | ≤0.15 |
| Resin System | Epoxy | |
| Reinforcement | 7628 Glass Fabric | |
| Thermal Class | °C | 130 ±5 |
| Standard Colors | Green (Natural), Yellow | |
| Flexural Strength | MPa | ≥400 |
| Tensile Strength | MPa | ≥300 |
| Compressive Strength (Perpendicular) | MPa | ≥350 |
| Elastic Modulus | MPa | ≥24,000 |
| Impact Strength (Parallel) | kJ/m² | ≥33 |
| Dielectric Strength (Thickness ≤3mm) | kV/mm | ≥10.2 |
| Breakdown Voltage | kV | ≥35 |
| Comparative Tracking Index (PTI) | ≥200 |
G10 epoxy fiberglass sheets are available in a wide range of standard and custom dimensions.
1020 × 1220 mm
1220 × 2040 mm
1220 × 2440 mm
48″ × 96″
Large Custom Sizes:Custom oversized sheets up to 2000 × 3200 mm are available upon request.
0.1 mm – 100 mm (Custom thicknesses available)
Available Colors:Green (Natural)/Yellow/Black/White
Thanks to its outstanding balance of electrical insulation and mechanical performance, G10 is widely used across multiple industries.
| Industry | Typical Applications |
|---|---|
| Power & Electrical | Switchgear insulation parts, transformer insulation boards, motor slot wedges, busbar supports, insulation spacers |
| Electronics | PCB backing plates, FPC stiffeners, drilling backup boards, testing fixtures, potentiometer substrates |
| Mechanical Engineering | Lightweight gears, rollers, wear-resistant components, rotating blades |
| Special Environments | Cryogenic insulation structures, high-temperature insulation components |
Before purchasing G10 insulation sheets, consider the following factors:
G10 — UL94 HB (Non-flame-retardant)
FR-4 — UL94 V-0 (Flame-retardant)
Choosing the correct grade is essential for meeting electrical safety requirements.
Specify:Thickness/Length/Width/Color/Machining requirements/Quantity
Request relevant certifications, including:UL/RoHS/REACH/Material Test Reports (if required)
For new projects or volume orders, sample testing is recommended to verify mechanical and electrical performance before mass production.
Ztelec Group is a professional manufacturer of electrical insulation materials serving industries including transformers, electric motors, high- and low-voltage power equipment, PCB base materials, railway, and telecommunications.
We provide:
G10 Epoxy Glass Laminate Sheets
FR-4 Epoxy Glass Sheets
CNC Machined Insulation Components
Transformer Insulation Materials
Motor Insulation Materials
Custom Electrical Insulation Solutions
With decades of manufacturing experience, strict quality control, and compliance with international standards, we deliver reliable products, fast lead times, and comprehensive technical support for customers worldwide.
