3240 Epoxy Glass Laminate Sheet | 3240 Epoxy Phenolic Board Manufacturer & Exporter

Name: 3240 Epoxy Phenolic Glass Cloth Laminate
Brand: SNM New Materials
SKU: 3240
Availability: InStock

3240 Epoxy Phenolic Glass Cloth Laminate Sheet

3240 is a classic epoxy phenolic glass cloth laminate offering high mechanical strength, good heat resistance and reliable electrical insulation — a long-proven workhorse for transformers, switchgear and electrical machinery.

Standard / Grade

IEC / GB 3240

Base Material

E-glass woven cloth + epoxy phenolic resin

Colour

Yellow / brown-yellow

Density

≈ 1.8–1.95 g/cm³

Thickness Range

0.5 mm – 50 mm

Sheet Size

1020×1220 mm · 1220×2440 mm

Operating Temp.

Class B / F (130–155 °C)

Dielectric Strength

≥ 14 kV/mm (perpendicular)

Flexural Strength

≥ 340 MPa

Water Absorption

≤ 0.10%

Key Advantages

Why Choose Our 3240

🔥

Heat Resistant

Class B/F thermal performance for transformers and motors running at elevated temperatures.

⚡

Strong Insulation

Dielectric strength ≥14 kV/mm for dependable high-voltage insulation.

💪

High Strength

Flexural strength ≥340 MPa with excellent dimensional stability.

📐

Machinable

Easily CNC cut, drilled and milled into finished insulation parts.

Description

3240 Epoxy Phenolic Glass Cloth Laminate

3240 epoxy phenolic glass cloth laminate is produced by impregnating woven E-glass cloth with epoxy phenolic resin and hot-pressing it into rigid, high-strength boards. It has been a trusted insulation material in transformers and electrical machinery for decades thanks to its balanced electrical, mechanical and thermal properties.

With dielectric strength of at least 14 kV/mm, flexural strength ≥340 MPa and Class B/F heat resistance, 3240 performs reliably under combined electrical and mechanical stress. Low water absorption keeps its insulation stable in humid conditions.

We supply 3240 from 0.5 mm to 50 mm thick as full sheets, cut blanks or CNC-machined parts, with factory-direct pricing and reliable export to the USA, Mexico, Brazil and Europe.

Applications

Typical Uses

Transformer Insulation

Switchgear Parts

Motor Insulation

Terminal Boards

Insulating Washers

Spacers

Bus Bar Supports

Electrical Machinery

FAQ

Frequently Asked Questions

What is 3240 laminate used for?

3240 epoxy phenolic glass laminate is widely used for transformer insulation, switchgear parts, motor insulation, terminal boards and insulating washers.

What is the temperature rating of 3240?

3240 offers Class B to Class F heat resistance, suitable for continuous service around 130–155 °C depending on grade.

How does 3240 compare to FR-4?

Both are epoxy glass laminates. FR-4 adds UL94 V-0 flame retardancy, while 3240 is a classic epoxy phenolic grade optimised for transformer and machinery insulation.

What thicknesses are available?

We supply 3240 from 0.5 mm to 50 mm thick in standard and custom sheet sizes, plus CNC-cut parts.

Do you provide samples and export?

Yes, we offer free samples and export 3240 worldwide including the USA, Mexico, Brazil and Europe with full documentation.