The 3VA2450-5MN32-0CC0: Breaking capacity runs 187 kA at 240 VAC, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 17 kA at 690 V — so the 240 V figure tells you this breaker handles the high available fault current typical of step-down transformer secondaries, while the 690 V rating confirms it clears faults on 690 V line-fed drives without cascading upstream. Current derating is flat at 500 A from 40 °C through 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. That means in a hot panel — say 55 °C ambient — you lose only 5 A; the breaker still carries a 495 A load without nuisance tripping.
Trip unit and protection features
That is a common requirement for safety circuits and emergency-stop chains in machinery panels.
Mechanical fit and environmental limits
The 15 000 mechanical endurance cycles (latching) suit frequent-switching applications like compressor or pump motor feeders.