It carries a rated continuous current Iu of 50 A across four poles, with a rated insulation voltage Ui of 800 V — meaning it handles 400 V three-phase distribution without issue and has headroom for 690 V applications where the breaking capacity still holds at 11.9 kA. Breaking capacity is 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V — figures that cover most industrial low-voltage fault levels downstream of a transformer. The 50 A frame is thermally rated; it holds full current up to 50 °C ambient, then derates to 48 A at 55 °C, 47 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C. In a cement plant control room that hits 55 °C in summer, you lose 2 A — not enough to nuisance-trip a 45 A motor feeder, but worth knowing if you're running right at the limit.
Configuring the trip and auxiliary package
A shunt trip release (STL) is integrated for remote opening; the integrated auxiliary trip order code is 3VA9688-0BL32. The front face carries a voltage-trigger indicator and a mechanical trip indicator — so when you walk the panel after a fault, you see a red flag without needing a meter.
The 101.6 mm width is a standard 4-pole MCCB footprint — it occupies four 25.4 mm (1-inch) module positions on a DIN rail or mounting plate.