At 415 V and 440 V the rating holds at 242 kA, and at 690 V it still clears 52.5 kA, so this breaker is sized for main or feeder duty in heavy industrial switchgear, not branch protection.
Motor protection and trip unit
This is the motor protection version, equipped with an ETU350M electronic overcurrent release. The ETU350M provides adjustable thermal-magnetic or electronic trip curves tailored for motor starting inrush, plus phase failure detection — so it will trip on a lost phase before the motor winding overheats.
Physical integration and environment
The 3VA2450-7MN32-0HH0 measures 138 mm wide by 248 mm high by 110 mm deep — a standard SENTRON 3VA frame size for 500 A class. It mounts via four screws on a backplate or into a fixed MCCB cradle; no DIN-rail clip on this frame. Derating applies above 55 °C: the 500 A rating holds flat to 50 °C, then drops to 495 A at 55 °C, 490 A at 60 °C, 485 A at 65 °C, and 480 A at 70 °C.