3240 Glass Epoxy Sheets

3240 Glass Epoxy Sheets | High-Performance Electrical Insulation Laminate

3240 Glass Epoxy Sheets are high-quality electrical glass fabric reinforced epoxy laminates, manufactured by impregnating woven glass cloth with epoxy resin and curing it through controlled drying and hot pressing. This material is comparable to EPGC201 and is widely used for electrical and structural insulation in motors, transformers, and electrical equipment.

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3240 Glass Epoxy Sheets | High-Performance Electrical Insulation Laminate

3240 laminates offer excellent mechanical strength, high dielectric performance, good heat resistance, and low moisture absorption. They maintain stable electrical properties even after water immersion and can operate reliably in humid environments and transformer oil. Due to their excellent machinability, these sheets can be easily cut, drilled, and milled into precision components such as gaskets, gears, spacers, motor parts, and switchgear supports.

With a glass transition temperature (Tg) of 170–180°C and a continuous operating temperature of about 140°C, FR-5 is ideal for high-layer-count PCBs, power electronics, and automotive electronics where thermal reliability is critical. The material is certified to NEMA FR-5 and widely accepted across electrical and aerospace industries.

This grade is also highly cost-effective, providing a strong alternative to more expensive engineering plastics while still delivering reliable performance for large-scale electrical and industrial applications.

Product Details

Grade

3240 (Equivalent to EPGC201)

Material

Woven Fiberglass + Epoxy Resin

Thermal Class

Class B

Color Options

Yellow

Thickness Range

Customizable

Size Format

Sheets, cut-to-size

Typical Applications

Battery, Switchgear, PCB, transformers, insulation parts

NEMA, IEC, Mil Spec Material Comparative Table
NEMA	IEC	Mil Spec	Resin	Substrate
NEMA G-10	EPGC 201, 21*	MIL-I-24768/2 GEE	Epoxy	Glass Cloth
NEMA FR4	EPGC 202, 23*	MIL-I-24768/27 GEE-F	Epoxy	Glass Cloth
NEMA G-11	EPGC 203, 22*	MIL-I-24768/3 GEB	Epoxy	Glass Cloth
NEMA FR5	EPGC 204	MIL-I-24768/28 GEB-F	Epoxy	Glass Cloth
—	EPGC 205	—	Epoxy	Glass Cloth
—	EPGC 306	—	Epoxy	Glass Cloth
—	EPGC 307	—	Epoxy	Glass Cloth
—	EPGC 308	—	Epoxy	Glass Cloth
—	EPGC 309	—	Epoxy	Glass Cloth
—	EPGC 310	—	Epoxy	Glass Cloth
—	EPGC 311	—	Epoxy	Glass Cloth
—	EPGM 203	—	Epoxy	Glass Mat
—	EPPC 301	—	Epoxy	Polyester Cloth
NEMA G-5	MFGC 201, 20*	MIL-I-24768/8 GMG	Melamine	Glass Cloth
NEMA G-9	MFGC 201	MIL-I-24768/1 GME	Melamine	Glass Cloth
NEMA C	PFCC 201, 23*	MIL-I-24768/16 PBM	Phenolic	Cotton Cloth
NEMA CE	PFCC 202, 22*	MIL-I-24768/14 FBG	Phenolic	Cotton Cloth
NEMA L	PFCC 203	MIL-I-24768/15 FBI	Phenolic	Cotton Cloth
NEMA LE	PFCC 204, 21, 24	MIL-I-24768/13 FBE	Phenolic	Cotton Cloth
NEMA X	PFCP 201, 21*	MIL-I-24768/12 PBM	Phenolic	Cellulosic Paper
NEMA XP	PFCP 201	MIL-I-24768/19 PBM-P	Phenolic	Cellulosic Paper
NEMA XXX	PFCP 204	MIL-I-24768/10 PBE	Phenolic	Cellulosic Paper
NEMA XX	PFCP 202, 23*	MIL-I-24768/11 PBG	Phenolic	Cellulosic Paper
NEMA XXP	PFCP 203	MIL-I-24768/21 PBG-P	Phenolic	Cellulosic Paper
NEMA XXXP	PFCP 204	MIL-I-24768/22 PBE-P	Phenolic	Cellulosic Paper
NEMA XPC	PFCP 207	MIL-I-24768/20 PBM-C	Phenolic	Cellulosic Paper
NEMA G-3	PFGC 201, 21*	MIL-I-24768/18 GPG	Phenolic	Glass Cloth
NEMA GPO-1	UPGM 201	MIL-I-24768/4	Polyester	Glass Mat
NEMA GPO-2	UPGM 202	MIL-I-24768/5	Polyester	Glass Mat
NEMA GPO-3	UPGM 203	MIL-I-24768/6	Polyester	Glass Mat
—	UPGM 205	—	Polyester	Glass Mat
—	PIGC 301	—	Polyimide	Glass Cloth
NEMA G-7	SIGC 201, 21*	MIL-I-24768/17 GSG	Silicone	Glass Cloth