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SP9-I Surge Protector with 230V/400V. Wide Voltage Compatibility: Suitable for AC 50/60Hz, 230/400V and below power supply systems. Multiple Protection Levels: Offers Protection Level 3 with voltage options ranging from 275V to 440V. Standardized Compliance: Conforms to GB/T 18802.11 standard for surge protective devices. Versatile Installation: Fits 35mm standard rail with IP20 protection rating for easy mounting. Customization Services: Provides custom services and tailored application solutions for clients. Industry Leading Brand: Backed by 39 years of industry leadership and professional manufacturing.