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Basic characteristics of FR4 PCB
May 18, 2017

Vertical bending Strength A: normal: E-1/150,150 ± 5 ℃ ≥ 340MPA

Parallel layer to impact strength (simply supported Beam method): ≥ 230KJ/m

Insulation resistance after immersion (D-24/23): ≥ 5.0x108 ω

Vertical layer to electrical strength (in 90 ± 2 ℃ transformer oil, plate thickness 1mm): ≥ 14.2MV/m

Parallel layer to breakdown voltage (in 90 ± 2 ℃ transformer oil): ≥ 40KV

Relative permittivity (50Hz): ≤ 5.5

Relative permittivity (1MHz): ≤ 5.5

Dielectric loss factor (50Hz): ≤ 0.04

Dielectric loss factor (1MHz): ≤ 0.04

Water absorption (D-24/23, plate thickness 1.6mm): ≤ 19mg

Density: 1.70-1.90g/cm ³

Flammability: FV0