When it comes to thermal performance and mechanical strength in high-power electronics, Metal Core Printed Circuit Boards (MCPCBs) are the go-to solution. Whether you’re building LED modules, automotive electronics, or power supplies, choosing the right MCPCB thickness can directly affect your product’s efficiency, reliability, and cost. In this guide, we’ll explain what standard MCPCB thickness really means, how it varies by application, and what you need to consider before placing your next order.
1. Introduction to MCPCB (Metal Core PCB)
MCPCB, or Metal Core PCB, is a type of printed circuit board that uses a metal (usually aluminum or copper) as its base to improve heat dissipation. Unlike standard FR4 PCBs, MCPCBs are designed to handle high-power loads while keeping thermal management in check.
The thickness of an MCPCB is a critical specification—it influences not only heat transfer capabilities but also mechanical stability and overall board cost.
2. What Is the Standard MCPCB Thickness?
The standard MCPCB thickness typically falls between 0.5mm to 2.0mm, with 1.0mm and 1.5mm being the most commonly used sizes across industries like LED lighting and power electronics.
- 0.5mm to 1.0mm: Ideal for compact LED modules
- 1.5mm: Widely used in lighting and general industrial electronics
- 2.0mm: Common in power electronics and heavy-duty applications
Price Range (2025):
- 1.0mm Aluminum MCPCB (1oz Cu, white solder mask): $0.35 – $0.55 per piece (for 1000+ units)
- 1.5mm Copper Core MCPCB: $1.20 – $2.00 per piece
3. Factors That Determine MCPCB Thickness
Several key factors affect the selection of MCPCB thickness:
- Power Load: Higher power requires thicker metal cores for better heat dissipation.
- Copper Thickness: If the copper layer is thick (e.g., 2oz or 3oz), a thicker base is needed to maintain mechanical strength.
- Application: LED lights, automotive modules, and power converters all have different thermal and structural needs.
Rule of Thumb: For every additional 1oz of copper, add 0.2mm–0.4mm to base thickness for optimal heat management.
4. MCPCB Thickness by Core Material
Aluminum Core
- Standard: 1.0mm or 1.5mm
- Cost-effective and commonly used for LED lighting
Copper Core
- Standard: 1.5mm to 2.0mm
- Better thermal conductivity but significantly more expensive
Typical Pricing (2025):
- 1.5mm Aluminum Core MCPCB: $0.50 – $0.70
- 2.0mm Copper Core MCPCB: $2.50 – $4.00
5. How Thickness Affects Performance
Thicker MCPCBs offer:
- Better thermal conductivity due to larger heat capacity
- Increased rigidity, reducing vibration and warping
- Higher production cost, especially with copper cores or thicker dielectric layers
Too thin a board may cause mechanical deformation, while too thick may result in processing challenges during assembly.
6. Common Use Cases and Recommended Thickness
| Application | Recommended Thickness |
| LED modules | 1.0mm – 1.5mm |
| Power converters | 1.5mm – 2.0mm |
| Automotive lighting | 1.5mm – 2.0mm |
| Consumer electronics | 0.8mm – 1.2mm |
Cost Example:
A 1.5mm aluminum MCPCB for LED lighting (2-layer, 1oz copper) costs around $0.45 – $0.65/pcs in 2025 at MOQ 1000.
7. Custom Thickness vs Standard Thickness
Standard thickness helps reduce cost and lead time. However, custom thickness may be required when:
- You use multi-layer structures
- The application requires special heat spread
- PCB must fit into non-standard enclosures
Lead Time Impact: Custom thickness may increase lead time by 3–7 working days and add 10–20% in cost.
8. MCPCB Thickness Tolerances and Manufacturing Standards
Most PCB manufacturers follow IPC-2221 standards for mechanical tolerances.
- ±10% thickness tolerance is common for aluminum-based boards
- High-precision MCPCBs may require tighter control, usually at a premium
Tip: Always confirm thickness tolerance with your supplier, especially for high-volume production.
9. How to Choose the Right Thickness for Your MCPCB Project
Here’s a quick step-by-step guide:
- Define power output and thermal load
- Choose copper thickness based on current requirements
- Select base metal (aluminum or copper)
- Balance mechanical strength vs. weight
- Consult your supplier for the most cost-effective standard option
Pro Tip: Ask for a thermal simulation report from your PCB manufacturer for critical designs.
10. Conclusion
Standard MCPCB thickness typically ranges between 1.0mm and 1.5mm, but the best choice depends on your application, power demands, and budget. Aluminum core boards remain the most popular and cost-effective, while copper cores are best for high-end thermal performance. Whether you’re an engineer or a procurement manager, understanding these thickness standards can save you time, money, and headaches in the production process.