Siemens 3NW7131 is a SENTRON cylindrical fuse holder that accepts 14 x 51 mm cylindrical fuse links in a three-pole configuration for protection in distribution and control circuits. It is rated for 50 A and 690 V AC, making it suitable for three‑phase protection in low‑voltage switchgear and panel assemblies. The housing measures about 90 mm in height, 81 mm in width, and 70 mm in depth, and it weighs roughly 306 g, with an IP20 protection rating. As part of the SENTRON line, this fuse base provides a robust, plug‑in mounting solution for standard cylindrical fuses in Siemens' engineering and procurement ecosystem.
