? The new 雷信信 No. surge protector according to IEC61000-4-5 and ITU-TK20 & K21 standard design, the use of multi-level protection circuit, use the latest high-speed surge protection devices, fast response, low output residual voltage, superior transmission performance. Interface uses standard industrial terminals, easy to use, suitable for ADSL telephone line signal products using composite symmetrical circuit, common mode and differential-mode full protection, L, N can easily access, use aluminum alloy shell, sealing, dustproof, anti- corrosion features, using series connected installation, high voltage pulse suppression on the line to protect the back-end equipment from lightning, industrial surge damage.?? ◆ Multifunction fine overvoltage surge protection? ◆ large flow (10 ~ 20KA )? ◆ low residual voltage (series protection)? ◆ High-speed response (1 ~ 25ns)? ◆ low loss (import plug wire-to-wire design)? ◆ long-life maintenance-free? ◆ three filter pressure protection