How do I know what junction box I need：全面指南
Publish Time: Author: Site Editor
| Item | PVC (Polyvinyl Chloride) | ABS (Acrylonitrile Butadiene Styrene) | PC (Polycarbonate) |
| Core Advantages | Lowest cost, corrosion resistant, moisture proof | Good rigidity, impact resistant, low temperature resistant, easy to process | Ultra-high impact resistance, wide temperature resistance, weatherproof, transparent available |
| Temperature Resistance | Low, ≤70°C, softens at high temperature | Medium, ≤80°C, average long-term heat resistance | Excellent, heat distortion temperature ≈130°C |
| Impact & Hardness | Soft texture, average impact resistance, easy to deform | Good toughness & rigidity, impact resistance better than PVC | High hardness, excellent toughness, top impact resistance |
| Weather & UV Resistance | Poor, easy to yellow and age, not for outdoor use | Average, weak UV resistance, suitable for indoor use | Strong, UV resistant and non-yellowing, ideal for outdoor |
| Flame Retardancy | Flame retardant grade depends on additives | Can reach V-0 (flame retardant modified) | Good self-extinguishing property, can reach V-0 |
| Appearance & Transparency | Opaque (white/grey) | Mainly solid color, non-transparent | Transparent available for internal observation |
| Cost | Lowest, cost-effective | Medium, higher than PVC | Highest, high-performance engineering grade |
| Typical Applications | Indoor home wiring, dry environments, low-cost projects | Indoor industrial equipment, household appliances, general impact-resistant scenes | Outdoor, high/low temperature, high reliability, transparent observation required |
| Comparison Items | Iron Junction Box | Aluminum Alloy Junction Box | Stainless Steel 304 | Stainless Steel 316 |
| Core Advantages | Lowest price, high strength, good rigidity, excellent electromagnetic shielding effect | Light weight, good heat dissipation, corrosion resistance, easy processing, exquisite appearance | Rust proof, moisture resistant, high strength, durable, cost-effective | Super corrosion resistance, salt spray resistance, acid and alkali resistance, marine/chemical grade durability |
| Weight | Heavy | Lightest | Medium to heavy | Medium to heavy (slightly heavier than 304) |
| Rust / Corrosion Resistance | Poor, easy to rust, must be protected by painting/galvanizing | Good, natural oxide film forms on the surface, no rust in general environment | Excellent, resistant to daily moisture and ordinary acid-base, not easy to rust | Extremely excellent, resistant to seawater, salt spray and strong corrosive environment, almost no rust |
| Weather Resistance | Ordinary, easy to age and rust outdoors | Good, suitable for general indoor and outdoor environments | Excellent, suitable for outdoor, humid and mild corrosive environments | Optimal, suitable for harsh environments such as coastal areas, chemical plants and marine |
| Strength & Impact Resistance | High, impact and deformation resistant | Above medium, good toughness | High, sturdy and durable | High, stable structure and not easy to deform |
| Heat Dissipation Performance | Ordinary | Excellent, one of the best heat dissipation among metals | Good | Good |
| Cost & Price | Lowest | Medium | Higher | Highest |
| Applicable Scenarios | Indoor general industrial control, low-cost projects, occasions requiring shielding | Built-in equipment, lightweight equipment, general indoor and outdoor use | Outdoor, humid workshops, general anti-corrosion needs | Coastal areas, ships, chemical plants, sewage treatment, high salt and high humidity environments |