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PCB Material Selector

PCB Material Selector Tool helps you compare material properties from multiple suppliers in one place. You can quickly filter PCB materials by Dk, Df, Tg, thermal conductivity, CAF resistance, and other key requirements for design and manufacturing.

Material Type

Board Type
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Chemical Properties

CAF Resistant?

Family Name and Manufacturer

IPC and Slash Number

Electrical Properties

Thermal Properties

Mechanical Properties

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About This Tool

Choosing the right PCB material is one of the most critical decisions in electronics design. Whether you are developing a high-speed digital circuit, an RF/microwave module, or a high-power automotive system, the substrate material you select directly impacts signal integrity, thermal performance, and long-term reliability.

Our PCB Material Selector tool helps engineers and designers quickly compare over 20 commonly used substrate materials — including FR4, Rogers 4003C, Rogers 4350B, PTFE-based laminates, ceramic-filled polyimides, and more. Simply filter by your design requirements — such as operating frequency, dielectric constant (Dk), loss tangent (Df), thermal conductivity, or maximum operating temperature — and the tool instantly narrows down the best-matched materials for your application.

Key material properties covered in this tool:

Dielectric Constant (Dk): Affects signal propagation speed and impedance control. FR4 typically has a Dk of 4.2–4.8, while Rogers laminates offer tighter tolerances from 2.9 to 10.2 for precision RF designs.

Loss Tangent (Df): Critical for high-frequency applications. Lower Df means less signal attenuation — PTFE-based and hydrocarbon ceramic materials typically achieve Df values below 0.004.

Thermal Conductivity: Essential for power electronics and LED applications. Standard FR4 offers around 0.3 W/m·K, while metal-core or ceramic-based materials can exceed 2 W/m·K.

Glass Transition Temperature (Tg): Determines the material’s heat resistance. High-Tg FR4 variants (Tg ≥ 170°C) are preferred for lead-free soldering processes and harsh environments.

Coefficient of Thermal Expansion (CTE): Influences solder joint reliability, especially for BGA packages and fine-pitch components.

Whether you are an experienced PCB designer or just starting out, this tool simplifies the material selection process and helps you make informed decisions — saving time and reducing costly redesigns.

FAQ

Frequently Asked Questions

What is the difference between FR4 and Rogers PCB material?
FR4 is a glass-reinforced epoxy laminate and the most widely used PCB substrate due to its low cost, good mechanical strength, and adequate electrical properties for frequencies below 1 GHz. Rogers laminates (such as Rogers 4003C and 4350B) are engineered for high-frequency RF and microwave applications, offering tighter dielectric constant tolerances, significantly lower loss tangent (Df), and better thermal stability. If your design operates above 1 GHz or requires tight impedance control, Rogers materials are strongly recommended over standard FR4.
Which PCB material is best for high-frequency RF designs?
For RF and microwave applications above 1 GHz, low-loss materials such as Rogers 4003C, Rogers 4350B, Taconic RF-35, and PTFE-based laminates (e.g., Rogers RT/duroid 5880) are the top choices. These materials offer loss tangent values below 0.004, stable dielectric constants across frequency and temperature, and excellent signal integrity. For millimeter-wave designs above 10 GHz, PTFE or ceramic-filled PTFE substrates are typically preferred.
What does dielectric constant (Dk) mean and why does it matter?
The dielectric constant (Dk), also called relative permittivity (εr), measures how much a material slows down electromagnetic wave propagation compared to a vacuum. A higher Dk results in a slower signal propagation speed and allows for smaller component dimensions — useful in compact antenna designs. A lower Dk means faster signals, making it suitable for high-speed digital and RF applications. Stability of Dk across frequency and temperature is equally important for precision designs.
What is loss tangent (Df) and how does it affect PCB performance?
Loss tangent (Df), or dissipation factor, measures how much electromagnetic energy is absorbed and lost as heat in the PCB substrate. A lower Df means less signal attenuation, which is critical for maintaining signal strength at high frequencies. Standard FR4 has a Df of around 0.020, while premium RF materials like Rogers 4350B achieve 0.0037, and PTFE-based materials can reach below 0.002. For applications operating above 500 MHz, selecting a low-Df material is essential to minimising insertion loss.
Can I use FR4 for high-speed digital designs?
FR4 can be used for high-speed digital designs at moderate data rates (typically up to 5–10 Gbps), provided that trace lengths are kept short and careful stackup design is applied. However, for designs exceeding 10 Gbps — such as PCIe Gen 4/5, 100G Ethernet, or high-bandwidth memory interfaces — low-loss FR4 variants (Megtron 6, Panasonic M series) or specialised high-speed laminates are recommended to reduce skin effect losses and dielectric attenuation.
What PCB material should I use for power electronics or high-temperature applications?
For power electronics, LED lighting, and automotive applications that generate significant heat, thermal management is the priority. Metal Core PCB (MCPCB) materials with aluminium or copper bases offer thermal conductivity of 1–3 W/m·K. Ceramic-filled laminates and polyimide substrates can withstand temperatures above 200°C. High-Tg FR4 (Tg ≥ 170°C) is suitable for environments with moderate thermal stress and lead-free solder processes. Use our material selector tool to filter by thermal conductivity and maximum operating temperature to find the right match.
How do I choose between Rogers 4003C and Rogers 4350B?
Both Rogers 4003C and 4350B are hydrocarbon ceramic laminates with similar dielectric properties. Rogers 4003C has a Dk of 3.55 and Df of 0.0027, while 4350B offers a Dk of 3.66 and Df of 0.0037. The key practical difference is UL 94 V-0 flame-retardant certification: Rogers 4350B carries this certification, making it the preferred choice for commercial products requiring regulatory compliance. Rogers 4003C is commonly used for prototypes and designs where flame retardancy is not a requirement.
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