Siemens 3VA1225-6EF32-0JH0 — 250 A SENTRON MCCB with 220 kA Interrupting Capacity
The Siemens 3VA1225-6EF32-0JH0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection, carrying 250 A continuously at 40 °C across its 3 poles. The interrupting capacity hits 220 kA at 240 V, 154 kA at 415 V, and 75.6 kA at 440 V — enough headroom for high-fault industrial distribution panels where selectivity and SCCR coordination matter. Rated insulation voltage is 800 V. Thermal derating is gradual: 250 A holds steady through 50 °C, then drops to 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C (–). That curve matters when the breaker sits in a crowded panel with adjacent heat sources — the 70 °C rating is the real-world limit for a hot enclosure. The breaker ships with a shunt trip release (STL) and two auxiliary switches plus one trip alarm switch (HQ). No undervoltage release, no ground-fault monitoring, no communication module — this is a straightforward line-protection MCCB for main feeders or large sub-feeders where remote tripping via the shunt trip is the only auxiliary control needed.
Panel Fit & Dimensions
The breaker measures 70 mm deep, 105 mm wide, and 158 mm high. That 105 mm width for a 3-pole 250 A frame is standard for SENTRON 3VA molded case breakers — it drops into the same DIN-rail or panel-mount footprint as other 3VA frames in this rating class. The 57 W maximum power loss drives ventilation requirements in sealed enclosures; plan for natural convection or forced airflow above that dissipation level.