The 3VA1450-4EF32-0KH0: The headline number for this breaker is its interrupting capacity: 121 kA at 240 V AC, dropping to 75.6 kA at 415 V and 440 V, then 52.5 kA at 500 V, and 11.9 kA at 690 V. The 690 V rating is lower but still covers most 480/277 V industrial services with headroom. The breaker is designed without communication function or ground-fault monitoring — it's a straightforward thermal-magnetic or electronic-trip line-protection device, not a smart breaker.
Above that, derate linearly: 488 A at 55 °C, 476 A at 60 °C, 464 A at 65 °C, and 452 A at 70 °C. At 70 °C you lose nearly 10% of the continuous rating. That's a 3-pole frame that fits standard Siemens SENTRON mounting bases. Max power loss is 122.7 W — plan ventilation or derating if you're stacking breakers tight.
Built-in auxiliaries and trip options
That covers remote status feedback and emergency-off integration without adding separate accessory modules. The undervoltage release is not included — if you need UVR, this isn't the order code. The trip indicator and voltage trigger are present, so you get visual flag and remote signal on fault. The breaker's basic switch assembly is 3VA14504EF320AA0 — that's the internal mechanism this order code is built around.