Siemens SPD69140NT U is a three‑pole surge protective device designed for 600 V systems, delivering steadfast transient protection for three‑phase power feeds. It carries the 1400 A designation in its model name, signaling its high‑level protection capability for demanding industrial and commercial electrical distributions. Identified by the SPD69140NT model number, this unit represents Siemens’ line of 3‑phase surge protection devices intended to guard critical equipment against voltage surges.
