RSP-4L-48
The Relpol RSP-4L-48 is dC surge arrester for protecting data/signal lines. Protection for 4 signal lines or 2 pairs of lines. Rated operating voltage 48 V DC. Surge protection response time: Line-line and Line-PG: ≤ 1 ns. Maximum continuous operating voltage for DC: 54 V, for AC from 38 V.
The protection capability of RSP-4L-48 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.