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Help CenterG11-H Epoxy Glass Laminate Sheet / EPGC308
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Description
EPGC308 is a high-TG epoxy fiberglass laminate designed for electrical insulation applications under demanding conditions. It is made from electronic-grade alkali-free fiberglass cloth impregnated with high-TG epoxy resin, then cured under heat and pressure. The resulting board offers excellent mechanical strength at both room and elevated temperatures, and maintains stable electrical properties in dry, humid, or transformer oil environments.
Classified as H-class (180°C) heat-resistant insulation, EPGC308 is ideal for high-reliability electrical and mechanical components subjected to high temperature, high voltage, and harsh operating conditions.
Features
Base Material: Epoxy resin reinforced with 7628 fiberglass
Heat Resistance: H-Class (180°C)
High Voltage Capability: Withstand voltage range from 20kV to 100kV
Excellent Moisture Performance: Stable electrical properties under humid conditions
Outstanding Mechanical Strength: Maintains high strength at medium to elevated temperatures
Tensile elongation >50% at high temperatures
Superior Insulation Stability: Insulation resistance up to 10¹² Ω even after water immersion
High Dielectric Strength in Humid Environments: >35kV when laminated parallel to layers
Physical Characteristics: Yellow-brown color; thickness range 0.5–80mm; standard and customized sizes available
Standards Compliance: IEC60893-2004 and GB/T 1303.4-2009
Applications
High-End Electrical Equipment: Insulation components for high-end electrical devices: insulators and winding insulation
Traction & Large Motors: Slot wedge insulation in H-Class traction motors and large motors
Electrical Switchgear: High-voltage switch components and switch substrates
Motor & Electromechanical Parts: Motor housings, electromechanical structural parts, and machine components
High Dynamic Load Applications: Elements supporting high dynamic forces
High Frequency Equipment: Insulation parts for high-frequency electrical equipment
General Insulating Parts: Terminal boards, tag strips, bolt insulation, and press/mould components
| G11-H Epoxy Glass Laminate Sheet / EPGC308 | ||
| Physical Properties： | Unit | Standdard Value |
| Density | gc/m3 | 1.80-2.1 |
| Water Absorption (5mm) | % | ≤0.04 |
| Flame Retardant | UL94 | – |
| Electrical Properties： | Unit | Typical Value |
| Electrical Strength ⊥ thickness 3mm | kV/mm | ≥10.2 |
| Electrical Strength ∥ | kV | ≥45 |
| Tracking Resistance | PTI | – |
| Insulation resistanceafter immersion | MΩ | 5*104 |
| Mechanical Properties： | Unit | Typical Value |
| Flexural Strength | MPa | ≥340 |
| Tensile Strength | MPa | ≥300 |
| Compressive Strength ⊥ | MPa | ≥350 |
| Modulus Of Elastricity | MPa | ≥24000 |
| Impact Strength ∥ | kJ/m2 | ≥50 |
| Thermal Properties： | Unit | Typical Value |
| Thermal Charactersitices | ℃ | 180 |
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