SP9 Series surge protection device (hereinafter short as SPD), suitable for three phase distribution system with rated operating voltage AC 230/400V, 50Hz, confirm to SPD class I test classification, its impulse current peak value up to 25KA (10/35µs), electric charge qty up to 20As, limiting the direct lightning strike, induction lightning or other instant over voltage, discharge the surge energy, to protect the system circuit and load equipment. 

Suitable to coordinate with other class SPD, to form layer stack protection system, make more wide and more effective protection to the low voltage distribution system.

Standard: GB18802.1, IEC61643-1