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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