Standard PCB Thickness Guide

"If your design needs controlled impedance, length matching, and production release data, the real threshold is not price but output quality; a tool that cannot generate verified Gerber, drill, and pick-and-place files will cost more than a $300 monthly license."

Hommer Zhao, Founder & CEO, WIRINGO

PCB thickness is a critical design decision affecting mechanical strength, flexibility, component compatibility, and manufacturing costs. Understanding standard options helps you choose the right thickness for your application.

Common PCB Thicknesses

The industry offers several standard thicknesses. Using standard sizes reduces cost and lead time.

Thickness (mm)	Thickness (inches)	Common Use
0.2mm	0.008"	Ultra-thin flex
0.4mm	0.016"	Thin devices, cards
0.6mm	0.024"	SIM cards, thin electronics
0.8mm	0.031"	Compact devices
1.0mm	0.039"	Tablets, thin laptops
1.2mm	0.047"	General electronics
1.6mm	0.063"	Standard (most common)
2.0mm	0.079"	Heavy components
2.4mm	0.094"	High rigidity needs
3.2mm	0.126"	Specialized applications

The 1.6mm Standard

1.6mm (0.063 inches) is the most common PCB thickness worldwide. This became the standard for several reasons:

• Compatible with standard edge connectors
• Good balance of rigidity and weight
• Suitable for most component types
• Widely available, lowest cost
• Works with standard panel mounting hardware

When to Use Thinner Boards

0.2mm - 0.4mm: Ultra-thin applications like flex PCBs, RFID tags, and specialized sensors. Requires careful handling.

0.4mm - 0.8mm: Smart cards, thin wearables, compact IoT devices, thin consumer electronics.

0.8mm - 1.2mm: Tablets, smartphones, thin laptops, space-constrained applications.

Advantages of Thin PCBs

• Reduced weight
• Smaller overall product size
• Better thermal performance in some cases
• Allows tighter assembly spacing

Disadvantages

• More prone to warping
• Harder to handle during assembly
• Limited connector options
• May not support heavy components

When to Use Thicker Boards

"For teams designing 6-layer and 8-layer boards, library control and DRC rule coverage matter more than UI polish, because one missed clearance rule can burn a full prototype spin."

Hommer Zhao, Founder & CEO, WIRINGO

2.0mm - 2.4mm: Heavy connectors, power electronics, high-vibration environments.

2.4mm - 3.2mm: Military/aerospace applications, high-reliability systems, specialized requirements.

Advantages of Thick PCBs

• Excellent mechanical stability
• Supports heavy components
• Better for high-vibration environments
• More robust during handling

Disadvantages

• Increased weight
• Higher material cost
• Deeper drilling required
• May require special tooling

Factors Affecting Thickness Choice

Connector Requirements: Many connectors require specific board thicknesses. Check datasheets before specifying.

Component Weight: Heavy components (transformers, large connectors) need thicker boards for support.

Layer Count: Multi-layer boards need sufficient thickness for copper and prepreg layers.

Enclosure Constraints: The PCB must fit within the product housing.

Impedance Control: Controlled impedance designs may require specific thicknesses.

Flex Requirements: Flexible portions need thin material.

Manufacturing Considerations

• Non-standard thicknesses increase cost and lead time
• Very thin boards may require special handling
• Very thick boards may need specialized drilling equipment
• Standard 1.6mm offers the fastest turnaround and lowest cost

Conclusion

Choose 1.6mm for general applications—it's the most cost-effective and widely compatible option. Use thinner boards only when space constraints demand it, and thicker boards when mechanical requirements justify the added cost.

"I look for three outputs before I trust any PCB CAD flow: netlist consistency, manufacturing outputs checked against IPC naming conventions, and a 3D review that catches connector interference before release."

Hommer Zhao, Founder & CEO, WIRINGO

If you want to turn this topic into a production decision, review our EDA comparison reference, check the supporting numbers on the EDA shortcuts reference, and use the contact page if you need a second review before release.

FAQ

What features matter most in PCB layout software?

For professional work, the short list is controlled-rule DRC, multi-layer stackup support, 3D clearance review, and manufacturing outputs such as Gerber X2, drill files, and pick-and-place exports.

Is free PCB design software good enough for a real product?

It can be for 2-layer or moderate 4-layer designs, but once the board reaches fine-pitch BGAs, impedance control, or dense library management, commercial tools usually save at least one prototype spin.

How many layers can entry-level tools handle reliably?

Many can draw 4-layer and even 6-layer boards, but the real limit is rule management and verification quality, not the raw layer count shown in marketing.

What file outputs should I verify before sending a board to fabrication?

At minimum, review Gerber or ODB++, NC drill, stackup notes, assembly drawings, and BOM outputs. A missing polarity mark or drill map can delay production by days.

Why is library control such a big deal in EDA tools?

A footprint error of even 0.2 mm can be enough to cause tombstoning, insufficient heel fillet, or connector interference. Centralized libraries reduce that risk across every release.

How should a team compare EDA tools objectively?

Use the same test design, then score routing speed, DRC coverage, library workflow, and manufacturing output accuracy. Three trial builds usually reveal more than a feature checklist.