Heavy Copper PCBs are printed circuit boards featuring copper conductors 3 oz/ft2 – 10 oz/ft2 in inner or outer layers. These printed circuit boards are valued immensely, due to their thermal management capabilities. When heavier copper is electroplated to the PCB, it ensures high reliability and efficient power distribution. This post discusses heavy copper PCBs in detail.


Advantages of Heavy Copper PCB


Heavy copper PCBs are normally used in high power transmission applications due to several advantages they offer. Let us look at few of them.


  • Heavy base copper allows delivery of consistent and reliable power.
  • The external heat sink fitted inside the panel of heavy copper PCB allows the dissipation of heat carried by the copper plate of about 120 oz.
  • The I2R losses are reduced in heavy copper PCBs by taking heat away from valuable components, therefore reducing failure rates.
  • Multiple copper weights on the same layer of circuit gives the product a compact shape and size.
  • High-current circuits and control circuits are integrated on a single PCB, thus offering increased current carrying capacity, and higher tolerance to thermal strains


Applications of Heavy Copper PCB


The following are a few important industrial applications that are driven by heavy copper PCBs.


  • Power supplies for weapons control systems.
  • Planar transformers
  • Energy storage and power grid back up
  • Nuclear power applications
  • Line reactors panels
  • Hydro-electric plants
  • Amplification systems.


There is a growing demand for heavy copper PCB, in many industries. These PCBs are known for excellent thermal management in various applications which makes them popular.