Siemens NXD63B120 Molded Case Circuit Breaker

Siemens Sentron NXD63B120 is a 1200 A, three-pole molded-case circuit breaker from the NXD6 family, engineered for high‑current feeders in commercial and industrial power distribution. It employs a thermal‑magnetic, non-interchangeable trip unit enclosed in a rugged molded‑case housing rated for up to 600 VAC and 500 VDC, enabling reliable overcurrent protection across mixed AC and DC circuits. The breaker is bolt‑on mounting on compatible NXD frames and carries a 25 kA interrupt rating at 600 VAC, providing robust fault‑current protection for large feeders and distribution gear. With a continuous current rating of 1200 A and a fixed protection characteristic, NXD63B120 delivers consistent performance in demanding electrical rooms and power centers, aligning with Siemens Sentron low‑voltage solutions for dependable, standards‑conforming protection. Ideal for industrial power distribution environments where high-current protection of feeders is required, including large electrical rooms and switchgear assemblies.