FR4 Machined Components – Applications FR4 machined parts are widely used in electrical and electronic industries for their excellent electrical insulation, high mechanical strength, heat resistance, and flame-retardant properties. Typical applications include: • Busbar Supports • Insulation Supports • Terminal Barriers • Transformer & Switchgear Insulation Parts • Electrical Control Panels • Circuit Breakers & Distribution Panels Precision CNC machining ensures high accuracy, durability, and reliable performance in high-voltage electrical systems.