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NEMA FR4

NEMA FR4 has high flexural, impact and bond strength at room temperatures. It retains good electrical properties under dry and humid conditions. It is used in the electrical industry and anywhere a high strength electrical insulator in humid or dry conditions is needed. NEMA FR4 is UL listed.

Sheet Sizes: 36"x48"; 48"x48"; 48"x96"; 48"x108"
Thickness: 0.031" to 5"
Color: Natural & Black

NEMA FR4 Data Sheet

Specifications

Density 119 pcf / 0.69 pci
Maximum operating temperature
- electrical 266ºF (130ºC)
- mechanical 284ºF (140ºC)
Water absorption 0.05%
Hardness (Rockwell M) 109
Compression strength 60,000 psi
Tensile strength 50,000 psi
Flexural strength 65,000 psi
Impact strength – Izod edgewise with grain 12 ft-lb/in
Dielectric strength 550 volts/mil
Dielectric constant (1,000,000 cycles/second) 5
Volume resistivity 6 x 1,000,000 megohm-cm
Arc resistance 100 sec
Parallel dielectric 60kv
Surface resistivity 1 x 1,000,000 megohms
NEMA FR4 Products