FR5 epoxy glass sheet combines heat resistance, electrical insulation and flame-retardant performance. Manufactured from woven glass fabric impregnated with epoxy resin and consolidated under heat and pressure, this rigid thermoset laminate is used for insulating components that also provide mechanical support.
Material Designations and Standards
EPGC 204 is commonly cross-referenced with NEMA FR5 and DIN HGW2372.2. The relevant IEC material specification is IEC 60893-3-2, covering rigid laminated sheets based on epoxy resins.
Purchase specifications should identify the required grade, applicable standards and acceptance criteria.
Heat Resistance and Flame-Retardant Performance
YILONG specifies EPGC 204 as a Class F insulation material, with a thermal endurance of 155°C and UL 94 V-0 flammability performance.
Thermal endurance should be considered alongside mechanical loading, exposure duration and the complete insulation system. Short-term performance at elevated temperature and long-term resistance to thermal aging are separate considerations.
UL 94 V-0 describes performance in a controlled vertical burning test. For applications with specified flammability requirements, confirm supporting test documentation for the selected material and thickness.
Reference Mechanical and Electrical Data
YILONG publishes the following test values for its EPGC 204 sheet. These figures are reference results; contractual limits and complete test conditions should be confirmed for the supplied material.
These properties support the use of FR5 for components requiring both electrical separation and structural rigidity. Component design should account for load direction, fastening details, insulation clearances and operating conditions.
Applications in Electrical and Power Equipment
EPGC 204 can be machined into insulating partitions, terminal plates, spacers, mounting plates and support components for switchgear, distribution equipment, motors and transformers.
Material thickness and geometry should be selected to meet the assembly’s electrical and mechanical requirements.
Applications in Energy Systems and Industrial Machinery
FR5 is also used for insulating and supporting components in inverters, electronic equipment and energy-system electrical assemblies. Industrial applications include fixture plates and machinery components where rigidity, insulation and heat resistance are required together.
The appropriate grade depends on the actual component temperature and service conditions.
FR5 Sheets and Custom Machining from YILONG
YILONG supplies EPGC 204 sheets in standard and customized formats, including 1020 × 2040 mm and 1220 × 2440 mm panels. Thickness, color and finished dimensions can be reviewed according to project requirements.
CNC machining enables holes, slots, pockets and shaped profiles to be produced from customer drawings. Critical tolerances and inspection requirements should be agreed before production.
For FR5 sheet specifications or custom insulation parts, visit www.yilonginsulation.com, email yilong@yilonginsulation.com, or contact YILONG on WhatsApp at +86 15866869385.
EPGC 204 is commonly cross-referenced with NEMA FR5 and DIN HGW2372.2. The relevant IEC material specification is IEC 60893-3-2, covering rigid laminated sheets based on epoxy resi
Selecting the appropriate material requires consideration of operating temperature, electrical stress, mechanical load and environmental conditions.
EPGC 203 is a rigid thermoset laminate manufactured from woven glass fabric impregnated with epoxy resin and consolidated under heat and pressure.
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