G10

FR4

Density

g/cm3

1.70~1.90

1.70~1.90

Warpage≤
Thickness:3~6mm
Thickness:6~8mm
Thickness:>8mm

mm

10
8
6

10
8
6

Flexural strength perpendicular to lamination ≥
Lengthwise
Transverse direction

MPa

340
250

340
250

Impact strength (charpy,Lengthwise)≥

kJ/m2

37

37

Adhesion strength≥

N

6500

6500

Insulation resistance≥
Under normal condition
After impregnated in water at 24h

Ω

1×1012
5×1010

1×1012
5×1010

Dissipation factor≤
50Hz:
1MHz:

—

0.04
0.04

0.04
0.04

Relative dielectric constant≤
50Hz:
1MHz:

—

5.5
5.5

5.5
5.5

Water absorption rate≤

%

0.25

0.25

Voltage endurance perpendicular to lamination in transformer oil 1 min at 90±2℃≥
Thickness:0.5~1.0mmmm
Thickness:1.1~2.0mmmm
Thickness:2.1~3.0mmmm

kV/mm

20
18
16

20
18
16

Voltage endurance parallel to lamination in transformer oil 1 min at 90±2℃≥

kV

35

35

Flammability

—

—

FV0

Oxygen index

%

—

40

Area of the sheets

mm

1020×1220

1020×2040