Siemens SENTRON 3VA1225-6GF42-0CH0 — 250 A 4-Pole MCCB for Line Protection
Its interrupting capacity is voltage-dependent: 220 kA at 240 VAC, 154 kA at 415 VAC, 75.6 kA at 440 VAC, 30 kA at 500 VAC, and 17 kA at 690 VAC — figures that govern the available fault current the breaker can safely clear at each system voltage.
Above that, the continuous current must be derated: 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C.
Dimensions are 158 mm height, 140 mm width, and 70 mm depth — a 4-pole frame that mounts into standard distribution panelboards or switchgear cubicles. The depth of 70 mm (2.76 in) is the dimension to check for gland-plate clearance and enclosure depth.