Siemens 3VA6110 5HN31 0AA0 Molded Case Circuit Breaker

Siemens 3VA6110-5HN31-0AA0 is a three‑pole molded‑case circuit breaker in the 3VA6 UL frame, rated for In = 100 A and featuring an ETU350 electronic trip unit with LSI protection. It is designed for 600 V systems (Ui/Ue 600 V) and delivers a breaking capacity of 35 kA at 480 V across three poles, making it suitable for protecting three‑phase distribution circuits and loads in industrial panels. The device specifies In = 100 A with overload protection Ir = 40 A and an instantaneous trip setting Ii = 12 × In (1200 A), plus short‑circuit protection Isd = 1.5–10 × Ir (60–400 A). Mechanical life is about 20,000 switching cycles, and power loss is approximately 4.33 W per pole (13 W per device at rated current) with the ETU350LSI trip unit. This compact 3VA6 breaker is used where reliable, electronic protection is required in three‑phase electrical distribution.