Siemens 3VA6340-6HN31-0AA0 Molded Case Circuit Breaker

Siemens 3VA6340-6HN31-0AA0 is a three‑pole molded‑case circuit breaker rated for 400 A and 600 V, built for robust protection in electrical distribution panels and switchgear. It incorporates an ETU350 electronic trip unit with Long‑Time, Short‑Time, and Instantaneous (LSI) protection, delivering precise overcurrent control and selectivity in demanding environments. The device provides Ui 600 V and Ue 600 V ratings, and a high breaking capacity of 65 kA at 480 V, making it suitable for locations with potential high fault currents. Configured as a fixed‑mounted unit with feed‑through capability, it supports reliable, field‑configurable protection schemes. The 3VA6 family is HACR‑type and UL 489 compliant, aligning with common building and industrial safety standards. Typical electrical performance includes approximately 70 W of total power loss (23.33 W per pole) in hot operating state and a mechanical life of about 15,000 switching cycles, reflecting solid endurance for regular in‑service cycling. This model’s combination of 600 V ratings, 400 A nominal current, and 65 kA at 480 V makes it a capable choice for main protection in commercial and light‑industrial power distribution.