Core Differences Between Die-cast Aluminum Junction Boxes and Plastic Junction Boxes

1. Structural Strength Die-cast aluminum boxes are one-piece molded with high rigidity and impact resistance, no deformation under harsh conditions. Plastic boxes are prone to warping, cracking and aging under temperature changes and UV exposure.
2. Weather Resistance & Lifespan Aluminum enclosures feature wide temperature tolerance (-40℃~85℃), UV & corrosion resistance, with a service life of over 10 years. Plastic enclosures degrade quickly outdoors, only lasting 2–3 years.
3. Protection Performance Aluminum boxes maintain stable IP65/IP67 waterproof & dustproof ratings permanently. Plastic enclosures easily lose tight sealing due to shell deformation, only offering basic IP44/IP54 protection.
4. Heat Dissipation & EMI Shielding Aluminum alloy provides excellent heat dissipation and electromagnetic shielding to ensure stable circuit operation. Plastic boxes have poor heat dissipation and no anti-interference performance.
5. Application Scenarios Aluminum junction boxes are ideal for outdoor, industrial, coastal, chemical and mining harsh environments. Plastic boxes are only suitable for indoor dry civilian low-voltage wiring scenarios.