Siemens SENTRON 3VA1140-6EF36-0KA0 — 40 A MCCB with Shunt Trip
Its interrupting capacity hits 220 kA at 240 V, 154 kA at 415 V, and 121 kA at 440 V — numbers that tell you this breaker is sized for high-fault installations where upstream SCCR demands serious headroom. At 690 V it still clears 17 kA, which covers most industrial motor branch circuits. It carries a factory-integrated shunt trip release (STL) — order code 3VA9688-0BL33 for the auxiliary trip block if you need remote tripping capability.
Thermal Derating and Ambient Constraints
Above that, it derates linearly: 38.4 A at 55 °C, 37.6 A at 60 °C, 36.8 A at 65 °C, and 36 A at 70 °C.
No auxiliary contact block or communication module is included, so the depth stays at 70 mm — no added protrusion behind the panel door.