# 2oz Copper PCB for ESD丨Heavy Copper PCB Manufacturer

_Published: 2025-08-01_

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- What Is 2oz Copper PCB?
- 2oz Copper PCB Thickness
- 2oz Copper PCB Current
- Why Choose 2oz Copper PCB for ESD?
- 2 oz vs. 1oz Copper PCB: ESD Performance Comparison
- ESD Protection Rules for 2oz Copper PCB Design
- Why Choose EBest Circuit (Best Technology) as Heavy Copper PCB Manufacturer?
- Our Heavy Copper PCB Capabilities
- How to Get A Quote For Your Heavy Copper PCB Project?

Why choose **[2oz Copper PCB](https://www.bestpcbs.com/blog/2025/08/2oz-copper-pcb-for-esd%e4%b8%a8heavy-copper-pcb-manufacturer/)** for ESD? Let’s discover thickness, current, benefits, ESD protection rules for 2oz Copper PCB.

**Are you troubled with these problems?**

- How can PCBs avoid overheating and burnout in high-current scenarios?
- How can signal stability be ensured in complex environments (high temperature/vibration)?
- How can heat dissipation efficiency be improved when traditional copper foil is insufficiently thick?

**EBest Circuit (Best Technology)’s Services and Solutions**

- 70μm-400μm ultra-thick copper layer design directly addresses high-current carrying and heat dissipation issues.
- Laser etching + electroplating fill-fill process ensures stable high-frequency signal transmission.
- Customized thermal simulation optimization tailors the design to the end application scenario, extending device life.

**Welcome to contact us if you have any request for [heavy copper PCB](https://www.bestpcbs.com/products/heavy-copper-pcb.htm): sales@bestpcbs.com.**

## What Is 2oz Copper PCB?

A** [2oz Copper PCB](https://www.bestpcbs.com/blog/2025/08/2oz-copper-pcb-for-esd%e4%b8%a8heavy-copper-pcb-manufacturer/)** refers to a printed circuit board with copper traces or planes weighing 2 ounces per square foot (oz/ft²). This equates to approximately 70 micrometers (µm) or 2.8 mils of copper thickness. Such PCBs are designed to handle higher current loads (e.g., 5–10A per trace) with reduced resistance and heat generation compared to thinner copper (e.g., 1oz). They are commonly used in power electronics, automotive systems, and industrial equipment where robust electrical performance and thermal management are critical.

[https://www.bestpcbs.com/blog/wp-content/uploads/2025/08/main.jpg](https://www.bestpcbs.com/blog/wp-content/uploads/2025/08/main.jpg)

## 2oz Copper PCB Thickness

A 2oz copper PCB has a copper layer thickness of approximately **70 micrometers (µm) or 2.8 mils**, equivalent to 2 ounces per square foot (oz/ft²). This thickness ensures low electrical resistance and efficient heat dissipation, making it ideal for high-current applications like power modules, motor controls, and LED lighting systems.

[https://www.bestpcbs.com/blog/wp-content/uploads/2025/08/2.png](https://www.bestpcbs.com/blog/wp-content/uploads/2025/08/2.png)

## 2oz Copper PCB Current

The current capability of a 2oz Copper PCB (70μm thickness) is approximately **2A per millimeter **of trace width for a 10°C temperature rise, doubling the capacity of standard 1oz PCBs. This assumes proper thermal management (e.g., vias, heat sinks) and ambient conditions. Factors like trace length, adjacent heat sources, and insulation layers also influence performance. For precise calculations, use the formula: I = 0.048 × ΔT0.44 × W0.725, where I = current (A), ΔT = temperature rise (°C), and W = trace width (mm).

[https://www.bestpcbs.com/blog/wp-content/uploads/2025/08/1.png](https://www.bestpcbs.com/blog/wp-content/uploads/2025/08/1.png)

## Why Choose 2oz Copper PCB for ESD?

Reasons why choose **[2oz copper PCB for ESD](https://www.bestpcbs.com/blog/2025/08/2oz-copper-pcb-for-esd%e4%b8%a8heavy-copper-pcb-manufacturer/)**:

- Lower Resistance, Faster Discharge: Thicker copper (70μm) reduces trace resistance, enabling rapid conduction of ESD currents to ground and minimizing voltage buildup.
- Enhanced Grounding Efficiency: Wider traces/planes with 2oz copper provide larger conductive surfaces, optimizing ESD paths and reducing impedance mismatches.
- Improved Thermal Dissipation: Higher copper mass absorbs and disperses heat generated during ESD events, preventing localized overheating and component stress.
- Mechanical Robustness: Thicker copper layers resist physical damage (e.g., trace lifting or cracking) caused by sudden ESD-induced current surges.
- Compliance with ESD Standards: Facilitates meeting IEC 61000-4-2 requirements by ensuring reliable ESD protection in high-risk environments (e.g., consumer electronics, industrial systems).

[https://www.bestpcbs.com/blog/wp-content/uploads/2025/08/3.png](https://www.bestpcbs.com/blog/wp-content/uploads/2025/08/3.png)

## 2 oz vs. 1oz Copper PCB: ESD Performance Comparison

**Parameter**
**2oz Copper PCB**
**1oz Copper PCB**

Copper Thickness
70μm
35μm

ESD Discharge Resistance
Lower (reduced voltage buildup)
Higher (risk of voltage spikes)

Thermal Capacity
Higher (absorbs/dissipates heat)
Lower (risk of thermal stress)

Trace Current Capacity
~2A/mm (10°C rise)
~1A/mm (10°C rise)

Mechanical Durability
Resists trace lifting/cracking
Prone to damage under ESD surges

Grounding Efficiency
Superior (low-impedance paths)
Moderate (higher inductance)

Compliance (IEC 61000-4-2)
Passes 15kV air/8kV contact (Level 4)
Struggles at high voltages (risk of failure)

Cost
Higher (20–40% premium)
Lower

Design Complexity
Requires wider traces/vias
Simpler for low-power ESD

## ESD Protection Rules for 2oz Copper PCB Design

ESD Protection Rules for 2oz Copper PCB Design

- Grounding Priority: Use full 2oz copper ground planes on inner/outer layers. Connect via stitching vias (≥4 vias/cm², 0.3mm diameter) to minimize impedance.
- Trace Design: ESD paths: ≥1.5mm width for 2oz copper. Keep traces