High-Quality SJKS1-B Series Surge Protection Device 80KV 385V Factories, Companies

The SJKS1-B series surge protective device (SPD) is a voltage-limiting type designed for indoor fixed installation, offering rapid <25ns response to suppress transient overvoltages from lightning and switching operations. Available in 40kA and 60kA nominal discharge current variants with up to 100kA maximum capacity, it features a built-in thermal disconnector that automatically isolates faulty modules and a visual window indicating green for normal operation and red for failure. Supporting AC 385–440V systems, the SPD suits building distribution, PV inverters, industrial controls, and communication equipment. Its pluggable modular design, optional remote alarm, and wide -40°C to +85°C operating range ensure reliable, maintenance-friendly overvoltage protection across diverse applications.