3240 Glass Epoxy Sheets Manufacturer in India
The 3240 epoxy fiberglass laminate sheet, known worldwide as EPGC201, is an advanced electrically rated laminate produced by impregnation of the woven fiberglass cloth with epoxy resin and then curing with hot pressing. Being the best-known and cost-efficient grade of epoxy laminate sheets in the field of electrical insulation products, the 3240 epoxy laminate is a preferred material by the producers of motors, transformers, and switchgears for its superior combination of strength and electrical properties along with competitive price.
As the foremost 3240 glass epoxy sheets supplier in India, Harnawa Inc. provides certified and tested 3240 laminates for electric motors, battery making, and panel fabrication manufacturers throughout India from our manufacturing facility based in Mumbai.
What is 3240 Epoxy Sheet?
3240 epoxy sheet is made by layering many sheets of woven glass cloth with epoxy resin and then bonding and curing them under heat and pressure conditions to create a uniform solid sheet. The 3240 epoxy sheet is a direct equivalent of EPGC201 according to IEC rating system and matches up with NEMA G-10 in the international material comparison systems.
3240 laminates offer good mechanical strength and dielectric performance, have good heat stability and moisture resistance. 3240 laminates exhibit constant electrical characteristics even after exposure to water submersion tests and work well in moist environment as well as in transformer oil contact. These characteristics make 3240 laminates very popular among Indian electrical manufacturing industry.
EPGC201 Sheet — Understanding the Equivalence
However, while selecting materials based on an international standard instead of NEMA grade, the search usually focuses on finding the “EPGC201” sheet designation. The “EPGC201” is the IEC designation for the woven glass cloth epoxy laminate which is equivalent to the 3240 and NEMA G-10. This makes it easy for the purchasing team to select the same base material using either Indian, IEC, or NEMA specification sheets.
Material Construction
The sheets of 3240 are composed of woven fiberglass cloth and reinforced using epoxy resin; they form a composite that is solid and stiff. This makes the sheets highly rigid, dimensionally stable, and resistant to moisture uptake, with excellent machinability where the sheets can be easily drilled, milled, and cut into parts like gaskets, gears, spacers, motor parts, and switchgear components.
Thermal Class B Rating
Epoxy fiberglass sheets in grade 3240 have been classified into the Thermal Class B category, which means their continuous operating temperature is appropriate for general purpose insulation applications. It can be said that classifying 3240 into Thermal Class B makes it reliable and economical whenever superior high temperature properties, such as FR-5 or G11, are not needed.
Color Options
3240 sheets are available in the usual yellow color which is in keeping with tradition within the industry and is used with epoxy resin laminated glass.
Thickness & Size Availability
The Harnawa Inc. provides 3240 sheets in fully customized thicknesses to match the mechanical and dielectric needs of your particular application, in addition to cut to size sheet format, thus cutting down on machining times and decreasing material waste.
Typical Applications of 3240 Epoxy Laminate Sheet
3240 glass epoxy sheets are widely specified across:
Battery Production
- Structural and insulating elements for the production of batteries
- Insulating support structures for the battery casing
Switchgear Production
- Insulation boards and structural elements in low and medium voltage switchgears
- Insulating structures for busbars
PCB Production
- Economical substrate material for PCBs used in general purpose applications
Transformer Production
- Structural insulation barriers and terminal board insulation
- Structures in dry and cast resin transformers
General Insulation Parts for Industry
- Insulating washers, spacers, gaskets, gears and motor parts
- Insulation for machine tools and industrial electronics
3240 vs Other Epoxy Glass Grades
| Property |
3240 (EPGC201 / G-10 equivalent) |
FR-4 |
FR-5 / G11 |
| Thermal Class |
Class B |
Class F |
Class F / Higher |
| Flame Retardancy |
Not flame-retardant |
Flame-retardant |
FR-5 flame-retardant / G11 not |
| Color |
Yellow |
Yellow |
Yellow / Yellow-green-amber |
| Best Suited For |
General-purpose, cost-effective structural & electrical insulation |
Fire-safety-critical applications |
High-temperature, high-reliability applications |
Summary: 3240 is the best cost-efficient option for all general electrical and structural insulation purposes that do not require flame resistance and Class F/H high-temperature rating capabilities. Thus, 3240 becomes an effective substitute for much costlier engineering plastics.
Building a Complete Electrical Insulation System
3240 sheets are frequently specified alongside other insulation materials to build a complete system for motors, transformers, batteries, and switchgear assemblies:
Sourcing all of these materials from a single, certified supplier ensures compatibility, consistent quality standards, and simplified procurement for OEMs and panel manufacturers.
Quality & Certifications
Each shipment of 3240 glass epoxy sheets from Harnawa Inc. undergoes production and testing according to international standards of quality, and this is guaranteed by:
- Certification from UL
- CE Mark Compliance
- RoHS Compliance
- ISO 9001:2015 Certified Manufacturing
- REACH Compliance
Thus, all the 3240 sheets we provide conform to the specification needs of both Indian producers and export oriented Original Equipment Manufacturers.
3240 Glass Epoxy Sheets Manufacturer in India — Why Choose Harnawa Inc.
The firm Harnawa Inc. enjoys the status of a prominent manufacturer of 3240 Glass Epoxy Sheets in India, offering laminate sheets similar to EPGC201 along with electrical insulation materials for use in transformers, motors, generators, switchgears, batteries, and industrial electronics.
What sets us apart:
- Reliable supply of 3240 / EPGC201-classified Class B epoxy laminate sheet
- Complete flexibility to customize thickness and cutting according to specifications
- Widely distributed across India, with presence in Mumbai, Delhi, Pune, Ahmedabad, and other cities
- Quality assurance certifications (UL, CE, RoHS, ISO 9001:2015, REACH)
- One-stop shop for both 3240 along with
Frequently Asked Questions
1.What does 3240 epoxy sheet relate to?
3240 epoxy is the same as EPGC201 according to IEC classification and similar to NEMA G-10, making it possible to substitute one another when working in Indian, IEC or NEMA standards.
2.What thermal class is 3240?
3240 epoxy fiberglass sheets are rated to Thermal Class B and fit for any general-purpose electrical and mechanical insulation.
3.Is 3240 flame-retardant?
No, 3240/EPGC201 is not flame-retardant. For applications where flame-retardance is necessary, the appropriate type would be FR-4 or FR-5.
4.Which industries consume 3240 epoxy laminate sheets?
3240 epoxy is commonly used in production of batteries, switchgears, printed circuit boards, transformers and for industrial insulation components.
5.Are 3240 sheets available in custom sizes?
Yes. Harnawa Inc. offers customized thickness and cut-to-size 3240 sheets in accordance to your application needs.
