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3250 Epoxy Glass Cloth Laminate – 3250 electrical insulation board manufacturer, factory direct export
3250 Epoxy Glass Cloth Laminate – 3250 electrical insulation board manufacturer, factory direct export 3250 Epoxy Glass Cloth Laminate sheet stock close-up, China factory supplier
3250Epoxy Glass LaminatesFactory DirectCNC Cut to Size

3250 Epoxy Glass Cloth Laminate Sheet

3250 is a high-temperature epoxy glass cloth laminate offering Class F/H heat resistance with strong mechanical and electrical properties for demanding high-temperature insulation.

Standard / GradeIEC / GB 3250
Base MaterialE-glass woven cloth + heat-resistant epoxy
ColourYellow / brown
Density≈ 1.85–1.95 g/cm³
Thickness Range0.5 mm – 50 mm
Sheet Size1020×1220 mm · 1220×2440 mm
Operating Temp.Class F / H (155–180 °C)
Dielectric Strength≥ 15 kV/mm (perpendicular)
Flexural Strength≥ 350 MPa
Water Absorption≤ 0.10%
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Key Advantages

Why Choose Our 3250

🌡️

Class F/H Heat Resistance

Continuous service up to 180 °C for high-temperature insulation.

⚡

High Dielectric Strength

Dielectric strength ≥15 kV/mm for high-voltage applications.

💪

Strong & Stable

High flexural strength and dimensional stability under heat and load.

📐

CNC Machinable

Cut and machined to finished insulation parts on request.

Description

3250 Epoxy Glass Cloth Laminate

3250 epoxy glass cloth laminate is a high-temperature insulation board hot-pressed from heat-resistant epoxy-impregnated glass cloth. It is engineered for Class F/H service, withstanding continuous temperatures up to 180 °C.

With dielectric strength ≥15 kV/mm and flexural strength ≥350 MPa, 3250 provides reliable insulation and mechanical durability in high-temperature transformers, Class H motors and switchgear. Low water absorption keeps performance stable in humid environments.

We manufacture 3250 from 0.5 mm to 50 mm thick as sheets or CNC-machined parts, with factory-direct export to the USA, Mexico, Brazil and Europe.

Applications

Typical Uses

High-Temp Transformers
Class H Motors
Switchgear
Terminal Boards
Insulating Parts
Spacers
Bus Bar Supports
Heavy Electrical Equipment
FAQ

Frequently Asked Questions

What temperature class is 3250?

3250 offers Class F/H heat resistance, suitable for continuous service up to about 180 °C.

What is 3250 used for?

3250 is used for high-temperature transformers, Class H motors, switchgear, terminal boards and machined insulation parts.

How does 3250 compare to 3240?

3250 offers higher heat resistance (Class F/H vs Class B/F) for more demanding high-temperature applications.

What thicknesses are available?

We supply 3250 from 0.5 mm to 50 mm thick in standard and custom sizes, plus CNC-cut parts.

Do you offer samples and export?

Yes, we provide free samples and export 3250 worldwide including the USA, Mexico, Brazil and Europe.

Order 3250 Direct From The Factory

Get a factory-direct quote, free sample and CNC cutting to your exact dimensions within 24 hours.

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