Feature: 1. Surge Protection: With over current and overheat protection, the surge arrester also enables temperature controlled short circuit. 2. Reliable Working: Low current leakage, quick response time and low residual voltage, the surge protective device is very reliable. 3. Clear in Display: The indication window will display different colors to better show the working status, simplifying the operation. 4. Premium Material: Adopting premium PC material that is flame retardant and very sturdy with corrosion, also very durable for use. 5. Easy to Install: Comes with light weight and compact size, the 35mm electrical guide rail installation is very easy to complete. Specification: Item Type: Surge Protective Device Model: SGSP 40 Uc: ~1000VDC In: 20KA, 8/20μs. Inmax: 40KA, 8/20μs. Up: ≤3.8KV Casing Material: Flame retardant PC. Installation: 35 standard guide rail installation. Protection Grade: IP20. Package List: 1 x Surge Protective Device