Conductive components (e.g., terminals, contacts, wires)
Preferred: Copper (Cu) or Brass (H65/H68)
Copper has excellent conductivity (resistivity approximately 1.7 × 10⁻⁸ Ω·m) and is widely used in wires, cables, and connectors.
Brass combines good conductivity with mechanical strength and strong corrosion resistance, making it particularly suitable for easily oxidized environments such as air conditioner compressors.
Alternative: Aluminum (Al)
Low cost and lightweight, suitable for high current transmission such as busbars, but attention must be paid to oxidation at connection points.
Insulating components (e.g., housings, insulating sleeves, junction boxes)
Preferred: PC (Polycarbonate) or PBT
PC has strong impact resistance and high temperature resistance (heat distortion temperature can reach over 130℃), suitable for safety-critical parts such as motor housings and relay housings.
PBT has good heat resistance and dimensional stability, commonly used in high-frequency applications such as sockets and temperature control switches.
High-End Choice: Reinforced Nylon (PA+GF)
With the addition of glass fiber, its tensile strength exceeds 150MPa, and its temperature resistance reaches over 250℃, making it suitable for high-voltage electrical appliances and automotive electronics.
Outdoor/Hydraulic Environments: Modified PPO or Stainless Steel
Modified PPO possesses halogen-free flame retardant, low-smoke, and non-toxic properties, making it suitable for low-voltage electrical appliance housings; stainless steel is used for distribution box housings, offering strong corrosion resistance.
Structural Support Components (e.g., Fittings, Cabinets, Brackets)
Preferred: Cold-rolled Steel or High-strength Aluminum Alloy
Cold-rolled steel is used in MNS switchgear accessories to ensure structural precision and strength.
Aluminum alloy is lightweight and high-strength, reducing power loss in transmission lines and suitable for power fittings.
Special Needs: Carbon Fiber Composite Materials
Used for lightweight fittings in ultra-high voltage projects, possessing excellent mechanical properties and corrosion resistance.