The Relpol RSP-E12.5-31 is surge protection device for AC installations, rated voltage 230 V AC. RSP-12.5- 31 is class I & class II (or T1+T2 ) prewired four poles SPD designed for low-voltage power system lightning current & surge protection, especially for location of high risk exposure or LPZ 0-2 building entrances ( IEC 62305-4), number of poles 4 (3p+1). Max. discharge current L-N / N-PE 80 kA/ 100 kA, lightning current capacity up to 12.5 kA 10/350 μs (L-N), 50 kA 10/350 μs (N-PE).
The protection capability of RSP-E12.5-31 is defined by the surge-current, operating-voltage, pole and class/type values stated above. Those exact ratings should be matched to the protected AC installation and its required lightning/surge protection level.