CMK Corporation

R&DHigh-current PWB

Product & Technology Product & Technology

Features

  • Compatible with 1000A or more
  • Achieve high current with 2.0 mm or more thick copper
  • Structure capable of high heat radiation (copper stack pin)

Development of a thick copper substrate compatible with high currents

Allowable current value calculation formula

  • I = kΔT0.44A0.725

    I : Electric current (A)k : Constant (Outer layer : 0.048 Inner layer : 0.024)
    ΔT : Temperature rise (°C)A : Conductor cross-sectional area (mil2)

    *1mil = 0.001 inch = 0.0254 mm

Reference IPC-2221A (Section6.2 Conductive Material Requirement)

  Rated
current value
(A)
Temperature
rise
(°C)
Minimum
pattern width
(mm)
Conductor
thickness
(mm)
Conductor
cross-sectional area (mm2)
Current
value
calculation
1008.8 20 32 3 96.0