This JLSP-GD1000/40/3P unit is a high-quality solar surge protection device that is designed to keep your system safe from excess voltage and current. Made by Anhui Jinli Electric Tech. Co., Ltd, It is manufactured in China and has been designed to meet the highest standards of safety and reliability. Uc=1200V, In=20kA, Imax=40kA, Up=4.0kV, 3 poles, dc spd for 1000V solar system,  it is easy to install and use. So whether you're looking for a reliable surge protection device or a high-quality electrical equipment supplier, this JLSP-GD1000/40/3P unit is the perfect choice.