4 oz copper pcb
What’s the heavy copper PCB?
The finish copper of conventional single side is 0.5OZ, and the finish copper of double side is 1OZ. The multilayer out finish copper is 1OZ, and the inner finish copper is 0.5OZ. When the copper is more than 2OZ, it is heavy copper pcb.

What is the application of 4oz copper pcb?
1.First of all, the modern PCB industry uses 4 oz. copper thickness in electronic devices that require high technology. In addition, you can apply 4 oz PCBs in soldering equipment.
2.Power converters are configured using 4 oz PCBs. In addition, you can also find this PCB useful in space systems and high-tech radar systems.
3.In addition, the 4oz copper PCB can be used in automotive and solar panel systems. It can also serve for electrical or general power systems.
4.Control panels are available for different industries. 4oz PCBs play an important role in industrial panel manufacturing. You will also find 4oz PCBs in vending machines, automotive instrument panels, amplifier systems, and lighting systems.

4 oz Copper PCB design can render some benefits such as:
- Capability to survive frequent exposure to excessive current
- High tolerance capacity that makes it compatible with applications in rough situations
- Compact product size due to several copper weights on the same layer of circuitry
- Onboard high-power-density planar transformers

4 oz Copper PCBs play a vital role in electronic devices, especially in applications that require efficient heat dissipation.
1.Excellent heat dissipation performance
First, the thermal performance of a 4-ounce copper PCB is significantly better than a standard 1-ounce or 2-ounce copper PCB.
This is because copper has a very high thermal conductivity and can quickly conduct heat from the heat source to a radiator or other heat dissipation structure, thereby effectively reducing the operating temperature of electronic components.
By using a thicker copper layer, the 4oz copper PCB is able to dissipate more heat in a shorter time, ensuring that the device can still operate stably under high power conditions.
2.Electrical performance has significant advantages
In addition, 4-ounce copper PCBs not only excel in heat dissipation, but also offer significant advantages in electrical performance.
Because the copper layer is thicker, the resistance when current passes through is lower, thus reducing power loss. This is especially important for high-current applications such as power management systems and high-power LED drivers.
In these applications, low resistance not only increases system efficiency but also reduces heat generation, further improving overall thermal performance.

3.4 oz copper PCB applications
(1) Battery management system for electric vehicles
First, 4-ounce copper PCBs are widely used in battery management systems for electric vehicles. Electric vehicles need to handle large amounts of current and heat, and the high thermal conductivity and low resistance properties of 4-ounce copper PCBs make them an ideal choice. By effectively managing heat, these PCBs extend battery life and improve overall vehicle performance.
(2) High-power LED lighting system
Another typical application is high-power LED lighting systems. LED lamps generate a lot of heat when working. If the heat cannot be dissipated in time, it may cause light attenuation or even damage. The efficient heat dissipation capability of the 4-ounce copper PCB ensures that the LED lamps operate stably for a long time under high brightness, thus improving the reliability and service life of the product.
(3) In industrial control equipment
In addition, in industrial control equipment, 4-ounce copper PCB also plays an important role. These devices usually need to handle high current and power. The low resistance and high thermal conductivity of 4-ounce copper PCB can effectively reduce heat accumulation and ensure that the device can still work stably in harsh environments. For example, in inverters and servo drives, the application of 4-ounce copper PCBs significantly improves the efficiency and reliability of the system.
In summary, 4-ounce copper PCBs are widely used in several high-power and high-current applications due to their excellent thermal performance and electrical characteristics. From electric vehicles to high-power LED lighting to industrial control equipment, 4-ounce copper PCB application examples fully demonstrate its importance in modern electronic equipment. Through continuous optimization and innovation, 4oz copper PCB will continue to play a key role in the future development of electronic technology.






