Item

Unit

Value

FR4 sheet

Density

g/cm3

2.1

Flexural strength perpendicular to lamination

under normal conditions ≥         

MPa

350

Bonding strength (≥10mm in thickness) ≥

N

6500

Impact strength parallel to lamination

(charpy) ≥

kJ/m2

37

Voltage endurance perpendicular to lamination

in transformer oil 1 minute at 90±2oC,

  Thickness1.0mm ≥

kV/mm

14.2

Voltage endurance parallel to lamination under

normal conditions ≥

kV

45

Insulation resistance after impregnated in water ≥

MΩ

5×104

Dissipation factor  ≤    

    50Hz:                                 

    1MHz:

-

0.04

0.04

Relative dielectric constant ≤

    50Hz:                                  

    1MHz:

-

5.5

5.5

Water absorption rate ≤

%

0.25

Flammability

-

FV0

Standard Operating Temperature

℃

150

Maximum Operating Temperature 10-20 seconds

℃

180

Thickness Available

mm

0.3~60

Sheet Size

mm

Standard size is 1020x1220