Metal Core PCB Material Selection

Metal Core PCB Selection Overview

Since 2008, KnownPCB has partnered with more than 4,000 industry pioneers around the world to tackle countless challenging PCB projects. In our experience, common metal substrates include Aluminum-based MCPCB, Copper-based MCPCB, and Stainless Steel MCPCB, also known as Insulated Metal Substrate (IMS) PCB. The selection of Metal Core PCB (MCPCB) is far from a simple material replacement, but a comprehensive issue deeply rooted in technology, application demands, and cost efficiency.

Metal Core PCB Assessment Dimensions

Metal core PCB selection can be assessed across three dimensions: power density and thermal conductivity requirements, cost budget, mechanical properties and environmental adaptation.

Aluminum-based MCPCB

Aluminum PCB: Our experience shows that Aluminum-based MCPCBs are the preferred choice for high-power LED, automotive lighting and conventional lighting applications as it performs excellently at thermal conductivity. With thermal conductivity of 1.5–2.0 W/m·K, which meets applications with a power density up to 10 W/in². Aluminum PCB can effectively dissipate component heat and avoid overheating failure.

Typical Applications

LED panels
Portable lighting
Outdoor LED displays
Lightweight electronic devices

Copper-based MCPCB

The thermal conductivity of copper core PCB is 3.0–4.0 W/m·K, which is twice that of aluminum-based. Copper core PCB is suitable for high-load scenarios with a power density ≥ 15 W/in², such as 5G communication base station RF modules and high-power industrial equipment, which can quickly dissipate heat and ensure stable operation.

Stainless Steel MCPCB

However, stainless-steel core PCB is ideal for special applications such as military industry and deep-sea exploration, with weak thermal conductivity but superior mechanical strength, anti-corrosion and high-pressure tolerance.

Thermal conductivity of 0.1–0.3 W/m·K, meanwhile the hardness of stainless-steel core is 3–5 times that of aluminum-based PCB, and the wear resistance can withstand high-friction scenarios.

Cost Budget Selection

The cost budget selection of metal-based PCBs can be accurately matched from the following dimensions:

Aluminum-based

In our experience at KnownPCB, raw materials and processing costs are the lowest among the three types. The cost of raw materials is only 1/3 of that of copper-based PCB, and manufacturing and processing costs are lower. Aluminum core PCB is a cost-effective choice for bulk purchases and may achieve a 10%-15% discount for annual volumes exceeding one million, making it suitable for conventional projects with a key concern about cost.

Copper-based

The cost of copper core PCB is about 2–3 times that of aluminum-based. According to our design team, this kind of PCB is recommended for projects with sufficient budget and extreme requirements for thermal conduction, such as 5G base stations, high-power charging piles, and other scenarios with high heat dissipation requirements.

Stainless Steel-based

The price per stainless steel core PCB is 4–6 times higher than aluminum PCB, typically used in special applications with extreme requirements for structural strength, such as military underwater sensing and precision instrument support. Its high hardness and corrosion resistance justify the cost in high-value applications.

Mechanical Integrity & Environmental Adaptability

In high-stakes environments, the mechanical integrity of a PCB is as critical as its electrical performance. At KnownPCB, we evaluate material durability through real-world stress. The mechanical properties and environmental adaptation of metal-based PCBs can be assessed across the following dimensions:

Aluminum-based MCPCB

For weight-sensitive devices such as portable lighting and outdoor LED screens, aluminum PCBs are optimal for lightweight and durability designs. They weigh only 1/3 of copper-based MCPCB and can easily handle industrial moisture conditions, providing an excellent balance of weight and durability.

Copper-based MCPCB

The ductility of copper-based PCB is 1.5 times that of aluminum-based, and the impact resistance can withstand vibration above 1000G, effectively absorbing and dispersing stress and preventing structural failure under extreme working conditions.

Stainless Steel MCPCB

Stainless steel-core PCBs have a hardness 3–5 times greater than aluminum-based PCBs, and their wear resistance offers excellent performance in high-friction environments. They are suitable for special equipment requiring mechanical pressure support, such as military detection devices and precision instrument structure support plates.

The KnownPCB team is committed to helping customers find a balance between extreme performance demands and commercial feasibility through multi-dimensional logical evaluation.