Siemens 3VA1150-6EF32-0AA0 Low-Voltage Circuit Breaker

Siemens 3VA1150-6EF32-0AA0 is a three‑pole molded‑case circuit breaker (IEC frame 160) from the 3VA1 family, designed for distribution protection in AC systems up to 415 V. It has a rated current In of 50 A and a high short‑circuit breaking capacity (Icu) of 70 kA at 415 V, making it suitable for demanding industrial installations. The device supports TM240 protection with ATAM coordination and provides thermal overload protection with a thermal current rating Ir of 35–50 A and short‑circuit protection Ii of 5–10 × In. Weighing about 957 g, it is built for reliability in panelboard and distribution applications and offers roughly 20,000 mechanical operating cycles and about 9,000 electrical endurance cycles (AC‑1, 380/415 V). Maximum power loss is specified at 14.6 W (4.87 W per pole) at rated current. The exact designation 3VA1150-6EF32-0AA0 identifies this model, which is supplied without a nut keeper kit by default.