Choosing suitable materials for electrical components requires comprehensive consideration of functional requirements, operating environment, safety standards, and cost-effectiveness to ensure reliable performance and economic rationality.
1. Define Component Functions and Match Core Performance Different functions have significantly different material requirements:
Conductive Components (e.g., terminals, contacts, busbars): Copper or brass is preferred due to its good conductivity and low contact resistance, effectively reducing the risk of overheating.
Insulating Components (e.g., housings, sleeves, junction boxes): PC, PBT, or modified PPO are recommended, possessing high dielectric strength, flame retardancy, and temperature resistance to ensure personnel and equipment safety.
Structural Components (e.g., brackets, cabinets, hardware): Cold-rolled steel, high-strength aluminum alloy, or stainless steel can be selected to ensure mechanical strength and long-term stability.
2. Assess the operating environment to improve durability. Environmental factors directly affect material lifespan:
Humid/Outdoor Environments: Select stainless steel (304/316L) or modified PPO for corrosion resistance and UV protection, preventing rust or aging failure.
High-Temperature Locations (e.g., boiler rooms, motor interiors): Choose Class H insulation materials (180℃ heat resistance), ceramics, or mica products to prevent insulation degradation.
Flammable and Explosive Areas: Low-smoke halogen-free (LSZH) flame-retardant materials must be used to reduce the release of toxic fumes during a fire, ensuring safe escape.
Frequent Movement or Vibration Scenarios: Flexible silicone rubber sheaths or wear-resistant PA (nylon) materials are recommended to enhance fatigue and wear resistance.