Interrupting capacity across voltages
The 3VA1150-4EF36-0DH0: This MCCB delivers 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V. Those numbers cover the full range of common industrial distribution voltages — 240 V single-phase, 415/440 V three-phase, and 690 V for heavy plant. The 121 kA at 240 V means it can handle high-fault utility feeds without cascading upstream.
Thermal derating — what the 50 A rating actually means
The 50 A rating holds from 40 °C through 50 °C, then begins to taper: 48 A at 55 °C, 47 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C. If your panel ambient runs above 50 °C — say a sealed enclosure near a furnace or in a hot climate — you lose 1–2 A per 5 °C step. Plan your load margin accordingly; the breaker will not trip early, but it will run warmer.
Overcurrent release and auxiliary contacts
The overcurrent release is a TM240 — a thermal-magnetic type with a 240 A fixed short-circuit pickup. That is a standard choice for general-purpose feeder protection. The auxiliary contact block ships as 2 auxiliary switches plus 1 trip alarm switch (HQ configuration), giving you separate NO/NC for status feedback and a dedicated alarm contact that changes state only on a fault trip.
Panel fit and integration
Dimensions are 130 mm height, 76.2 mm width, 70 mm depth. That 76.2 mm width is a standard 3-pole MCCB footprint — it fits the same DIN-rail or screw-mount cutout as other SENTRON 3VA frames. The IP40 front protection means it is splash-safe for panel interiors but not for washdown zones.