50 A, 4-pole MCCB with TM240 release
This MCCB delivers 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V. That steep roll-off above 440 V is typical for a compact-frame breaker — the 17 kA floor at 690 V still clears most industrial fault currents, but verify against your transformer size and cable length.
Thermal derating — no loss until 55 °C
At 55 °C it derates to 49 A, then 48 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C. For a panel builder: if your enclosure ambient runs at 55 °C, you lose 1 A; at 70 °C, you lose 5 A. The 14.6 W maximum power loss is manageable in a standard steel enclosure without forced ventilation at 50 A, but check the thermal budget if ganged with other breakers.
The 3VA1150-5GF46-0AA0 measures 101.6 mm wide, 130 mm tall, and 70 mm deep. The 4-inch (101.6 mm) width is the same as the 3VA1 frame family — it occupies four standard 25 mm DIN module spaces. Front IP40 protection means tools and fingers stay out, but the breaker is not sealed against washdown; mount in a clean, dry enclosure.