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FR4-03: Woven Fiberglass, Flame-Retardant

Physical Properties Values Units
Resin / Base Epoxy -
Color Ivory -
Fungus Resistance Fair -
Solvent Resistant Good -
Specific Gravity - -
Transparency - -
Water Absorption 0.35 %
Mechanical Properties Values Units
Compressive Strength 35 PSI x 10^3
Flexural Strength - Length 30 PSI x 10^3
Flexural Strength - Cross 25 PSI x 10^3
Flexural Modulus - Length 1.8 PSI x 10^6
Flexural Modulus - Cross 1.5 PSI x 10^6
Izod Impact - Length 0.6 Ft. lbs/In. notch
Laminate Bond Strength N/A Lbs
Punching Temperature 100 °F
Rockwell Hardness 104 M Scale
Electrical Properties Values Units
Capacitance Drift Fair -
Dielectric Constant 1 MHz 4.3 D24/23
Dissipation Factor 1 MHz .035 D24/23
Dielectric Breakdown (Para) 60 KV
Dielectric Strength (Perp) 700 V/MIL
Resistivity Surface 5 Megohms x 10^4
Insulation Resistance (EIA Pattern) 10 Megohms x 10^6
Thermal Properties Values Units
Glass Transition 60 °C
Thermal Conductivity 1.7 (5)
Coefficient of Expansion - Length 1.2 In./In./C x 10^-5
Coefficient of Expansion - Cross 1.7 In./In./C x 10^-5
Underwriter Lab Rating Values Units
Flammability 94V-0 -
High Ampere Arc 20 Cycles
High Voltage Tracking 11 In./Min
Soldering Limits - 500F 10 Seconds
Soldering Limits - 525F 8 Seconds
Maximum Operating Temperature 105 °C

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