FR4 sheet in LED Module Lighting Applications

I. Applications of FR4 in LED Module Lighting LED Light Source Circuit Board FR4 fiberglass sheet  is commonly us...

I. Applications of FR4 in LED Module Lighting

LED Light Source Circuit Board

FR4 fiberglass sheet  is commonly used as the PCB material in modules, carrying LED chips and electronic components, providing electrical connections and insulation.

It is widely applied in low-power LED modules such as panel lights, light strips, and tube lights.

Power Driver Board

LED modules usually include a driver circuit, and FR4 is the mainstream material for the driver control board due to its good dielectric strength and mechanical stability.

Insulation and Isolation Layer

Between the module and the metal housing, FR4 can serve as an insulation barrier to prevent leakage current and safety risks.

Support and Structural Components

In some LED module fixtures, FR4 boards are also used as supporting frames or mounting bases, ensuring overall module stability.

II. Technical Characteristics of FR4 Applications

Excellent Electrical Insulation – Ensures safety between LED chips, driver circuits, and the metal housing.

Moderate Heat Resistance – Can withstand typical LED operating temperatures, but in high-power modules it must be combined with aluminum substrates or heatsinks.

Flame-Retardant Performance – Usually required to meet UL94 V-0 standards, preventing ignition under high temperature or arcing.

Good Processability – Easy to drill, etch, and solder (SMT), making it suitable for mass production of LED modules.

Cost Advantage – Lower cost compared with aluminum and ceramic substrates, making it ideal for medium- and low-power lighting modules.

III. Typical Application Scenarios

LED Panel Light Modules: Large areas of FR4 PCBs are used as carriers for light sources.

LED Light Strips / Rigid Strips: FR4 is used as the baseboard for easy connection and assembly.

LED Tube Light Modules: FR4 is used for the circuit board, typically paired with aluminum tubes for heat dissipation.

Low-Power Downlights and Bulb Modules: FR4 is used for both the light source substrate and the driver circuit.

Industrial/Commercial Lighting Modules: FR4 is mainly used for driver PCBs, while the light source section often adopts metal substrates.