Panasonic R-3566D is a high CTI and high RTI material, it has an excellent tracking resistance and excellent heat resistance. This material is suitable for various applications that require high voltage and downsizing, such as automotive and industrial applications.
In this article, we’ll discuss what really characterizes the Panasonic R-3566D laminates. The relevant information is available for pcb design engineers to refer to in the selection of materials, And you can also call QFPCB to discuss. QFPCB offers the best services when it comes to the high CTI and high RTI Halogen-free Multi-layer PCB board, so please feel free to contact us.

What is the Panasonic R-3566D PCB Material?
R-3566D laminate is developed by Panasonic, it is a high-performance material characterized by its excellent comparative tracking index (CTI) and relative thermal index (RTI). These properties make it highly suitable for demanding applications that require superior tracking resistance and heat resistance. Specifically, R-3566D has a glass transition temperature (Tg) of 170 degrees Celsius, which ensures its stability and reliability under high-temperature conditions. This feature is particularly important for next-generation technologies such as electric vehicles (xEVs) and industrial devices, where both high heat resistance and high withstand voltage are critical requirements.
One of the key advantages of R-3566D is its ability to reduce printed circuit board (PCB) sizes. This is achieved through its exceptional tracking resistance, which allows for reduced creepage distances. The material’s performance in this regard is classified as PLC-0, indicating an extremely low risk of electrical tracking. Additionally, R-3566D is halogen free, making it environmentally friendly and reducing its impact on the ecosystem compared to traditional materials.
The material boasts an impressive CTI value of at least 600V, further enhancing its suitability for high-voltage applications. Its classification as PLC-0 underscores its reliability in preventing electrical failures due to tracking. These characteristics make R-3566D ideal for a wide range of applications, including automotive electronics, industrial equipment, and other sectors where high voltage and miniaturization are essential design considerations.
In summary, R-3566D offers a robust solution for modern electronic designs, combining high thermal stability, excellent electrical performance, and environmental sustainability. Its versatility makes it a preferred choice for engineers aiming to develop compact, reliable, and eco-friendly systems across various industries.
Panasonic R-3566D PCB Material Data Sheet



Features of the Panasonic R-3566D PCB Material
Glass Transition Temperature (Tg)
R-3566D exhibits a high Tg of 170 °C, ensuring dimensional stability and minimal mechanical stress under elevated operating temperatures. the material maintains structural integrity and mechanical stability under elevated temperatures, making it suitable for high-heat applications.
High Decomposition temperature
The decomposition temperature (Td) refers to the temperature at which a PCB material decomposes chemically. Panasonic R-3566D has a high decomposition temperature. The Td is 355 degree Celsius.
Excellent thermal reliability
This laminate is thermally stable when used at various temperatures. Thermal reliability refers to the ability of a material to remain stable when exposed to high temperatures. Panasonic R-3566D features great thermal reliability. Therefore, this laminate is ideal for use in varying temperature ranges.
Exceptional Tracking Resistance
Certified with a Comparative Tracking Index (high CTI ≥600V) and PLC=0, the material resists electrical arcing and carbonization, enhancing safety in high-voltage systems. CTI measures the extent at which a PCB material can withstand the unwanted flow of current between traces on the circuit board.
High Voltage CAF Resistance
The R-3566D material withstands Corona and Tracking phenomena, demonstrating resistance to conductive anodic filament (CAF) formation at voltages up to 1,000V, critical for high-voltage insulation integrity. Which helps prevent internal short circuits caused by moisture and voltage stress—enhancing long-term reliability and safety.
Excellent Peel Strength
Offers excellent peel strength, contributing to the durability and longevity of circuits. The R-3566D material maintains strong adhesion, with peel strength values 1.6 kN/m, ensuring robust copper bonding for reliable interconnects. This is particularly important for multi-layer PCBs where mechanical integrity is critical.
What is the Application of Panasonic R-3566D laminate?
Panasonic R-3566D’s combination of electrical performance and reliability makes it an ideal substrate for a variety of advanced electronic systems, including:
On Board Charger (OBC)
For electric vehicles (EVs), the on-board charger (OBC) plays a critical role in converting AC power from the grid into DC power for battery charging. R-3566D supports high-voltage isolation and efficient heat dissipation, making it an ideal substrate for OBC designs.
DC/DC Converter
In EVs and industrial systems, DC/DC converters require materials that offer excellent insulation and thermal endurance. R-3566D ensures long-term reliability and minimal signal distortion even under high-frequency switching operations.
Inverter
Inverters used in EVs, solar systems, and motor drives must handle high voltages and currents while maintaining safe insulation distances. R-3566D’s high CTI and CAF resistance make it a trusted choice for inverter PCBs.
In-Wheel Motor EV Charging Stand
For advanced EV architectures featuring in-wheel motors, the PCBs must withstand extreme environmental conditions. R-3566D delivers the mechanical strength and electrical insulation required for these cutting-edge applications.
HV Control Unit (High-Voltage Control Unit)
Used in EVs and industrial equipment, HV control units manage complex high-voltage operations. R-3566D provides the dielectric strength and thermal stability needed to ensure safe and consistent performance.
PV Module (Photovoltaic Module)
Solar power systems benefit greatly from materials that can endure harsh outdoor conditions while maintaining stable electrical performance. R-3566D is well-suited for PV module control boards and inverters, offering superior insulation and UV resistance.
Conclusion
Panasonic R-3566D laminates represent a breakthrough in high voltage and high performance PCB materials, combining exceptional insulation properties, thermal endurance, and ease of manufacturing. For engineers seeking a laminate that balances cutting-edge electrical properties with robust manufacturability, R-3566D is a future-proof choice.