SmithLamina FR4 glass epoxy laminates are continuous filament woven fiberglass sheets bonded with flame resistant epoxy resin. The material has the ability to maintain excellent mechanical, electrical, and physical properties at elevated temperature to 130�C.

FR-4 epoxy resin systems typically employ bromine, a halogen or halogen free, to facilitate flame-resistant properties in FR-4 glass epoxy laminates.

FR-4 glass epoxy is a popular and versatile high-pressure thermoset plastic laminate grade with good strength to weight ratios. With near zero water absorption, FR-4 is most commonly used as an electrical insulator possessing considerable mechanical strength. The material is known to retain its high mechanical values and electrical insulating qualities in both dry and humid conditions. These attributes, along with good fabrication characteristics, lend utility to this grade for a wide variety of electrical and mechanical applications.

Key Characteristics :-

  • Grade: NEMA LI-1 Grade FR4 / IEC 60893 EPGC 202 / Hgw 2372.1 / EP-4
  • Standard Colour: Green/Yellow
  • Specific Density: 1.80 - 2.00 Gm/cm3
  • Thickness: -
  • Standard Sizes: -

Technical Data :-

Key Characteristics Units Typical Values
Breakdown Voltage kV 65
IZOD Impact Strength Ft. – lb/in 13
Flexural Strength (0.062”) ksi 80
Moisture Absorption (3mm) % 0.10
Charpy Impact Strength KJ/m2 560
Perpendicular Electric Strength (90oC in Oil, 1.5mm) KV/mm 25
Parallel Breakdown Voltage KV >45
Insulation Resistance MΩ >107
Tensile Strength (0.125”) LW ksi(MPa) 62 (430)
Compressive Strength, Flatwise (0.500”) ksi(MPa) 66 (455)
High Current Arc Ignition (3 mm) Arc 120
Arc Resistance (3 mm) Sec 140
Comparative Tracking Index (3 mm) V 230
Dielectric Strength Condition A V/mil 635
NOTE: The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers' complete material property datasheets. All values at 73�F (23�C) unless otherwise noted.
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