Modular DIN rail surge protector for signal systems is suitable for the precise protection of various equipment's measurement and control circuits, preventing them from being damaged by surge overvoltages. The ultra-thin design (only 6 mm) and multi-line configuration are particularly suitable for protection in narrow spaces and for multiple pairs of lines. This series of products offers multiple voltage levels of 5 V, 12 V, and 24 V, and achieves full-mode protection for both high and low frequencies, as well as single and double line configurations. It is widely used in wind power generation, automation equipment, and oil and gas instrumentation protection.