Function: 1. This surge protector helps protect your AC power system from lightning or electrical surges. 2. Offers good electrical conductivity with internal components designed for accuracy and reliable performance. 3. Flame retardant materials enhance safety, reduce flammability, and support stable operation under stress for improved efficiency and user experience. 4. Easy to install with a 2P rail mount design. Compatible with standard 36mm DIN rails and circuit breakers in distribution boxes. 5. Provides overvoltage protection by quickly diverting excess voltage to ground within nanoseconds during events like lightning strikes, helping safeguard connected devices. Specification: Item Type: Surge Protection Device Model: CHLT 40PV Material: PC (fireproof) Maximum continuous working voltage: DC600V Nominal discharge current: 20kA (8/20s) Maximum discharge current: 40kA (8/20s) Voltage protection level: 2.8kV Number of Poles: 2P Protection level: IP20 Working temperature: -40 to 80 Working humidity: 90% (average at 25 ) Package List: 1 x 2P surge protector 1 x sliding sheet Note: 1. Power must be disconnected before installation. Working on live circuits is strictly prohibited. 2. Connect according to the installation diagram: + for positive line, - for negative line. Avoid incorrect connections. After installation, close the circuit breaker (fuse) and verify normal operation.