Properties

Processing condition

Unit

Nominal

thickness

of sheet

to which

test is

applicable

F880A

F881A

F882A

(G-10)

(FR-4)

(G-11)

Flexural

strength

(min)

LW

A

MPa

≥1.6

—

—

—

CW

350

350

350

LW

E-1/150 T150

—

—

207

Bonding strength

min)

A

N

≥10

6500

6500

6500

D-48/50

—

—

—

Impact strength

(min)

LW

E-48/50

kJ/M2

≥5

—

—

—

CW

37(A)

37(A)

37(A)

Dielectric strength

(in 90±2°C transformer

oil)(min)

A

kV/mm

≤3

14.2

14.2

14.2

1 mm in  thickness

Breakdown voltage

(min)

A

kV

≥3

45.0

45.0

45.0

D-48/50

—

—

—

Permittivity

(max)

A

 —

≤3

5.5

5.5

5.5

D-24/23

—

—

—

D-48/50

—

—

—

Dissipation factor

(max)

A

 —

≤3

0.04

0.04

0.04

D-24/23

—

—

—

D-48/50

—

—

—

Insulation resistance

After impregnated

in water(min)

D-24/23

W

all

5.0×1010

5.0×1010

5.0×1010

Water absorption       rate(max)

D-24/23

%

all

0.15

0.15

0.15

Flammability

Class

3

—

FV0

—

Reference standard

Q/TXXFR002-2009  NEMA(MOD)